Funfetti Oreo Cookie Bars Recipe – Easy Homemade Party Treats

The first time I pulled a pan of Funfetti Oreo Cookie Bars out of the oven, the kitchen smelled like a bakery, and my kids were practically bouncing off the walls in anticipation. You know that feeling when you’re waiting for something sweet and colorful to come together? That’s exactly what these cookie bars deliver. Each bite is a little celebration—chewy, buttery, and loaded with crunchy Oreo pieces and rainbow sprinkles. It’s like your favorite childhood birthday cake and classic cookies combined, but in bar form, and honestly, I can’t stop making them for every party.

I’ve made these Funfetti Oreo Cookie Bars for birthdays, potlucks, and even movie nights when my family just needed a little pick-me-up. Honestly, if you’ve got a soft spot for cookies and sprinkles (and let’s face it, who doesn’t?), you’re about to discover a new go-to treat. I first came up with this recipe after a failed attempt to make regular blondies—turns out, adding Oreos and sprinkles fixes just about anything!

What I love most about these cookie bars is how easy they are—no fancy mixer, no complicated steps. And you don’t need to mess with chilling dough or rolling out cookies. Just mix, bake, slice, and watch them disappear! If you’re looking for a party treat that brings the fun (and the flavor), these Funfetti Oreo Cookie Bars are about to be your new favorite. Trust me, I’ve tested and tweaked this recipe more times than I can count. It’s perfect for busy families, picky eaters, and anyone who loves dessert with a little extra sparkle.

Why You’ll Love This Recipe

• Quick & Easy: These Funfetti Oreo Cookie Bars come together in under 40 minutes—prep is a breeze, and no waiting for dough to chill. Great for those last-minute party plans or the “I need dessert now” moments.
• Simple Ingredients: Everything you need is probably already in your kitchen—just basic baking staples, Oreos, and sprinkles. No need for a fancy shopping trip.
• Perfect for Parties: These bars are colorful, festive, and easy to slice. I’ve served them at birthdays, baby showers, and school events, and they’re always a hit.
• Crowd-Pleaser: Kids and adults both go nuts for the chewy texture, crunchy Oreos, and bursts of funfetti color. Even picky eaters can’t resist grabbing seconds.
• Unbelievably Delicious: The combo of buttery cookie dough, chunks of Oreo, and sprinkles makes these bars next-level comfort food. Seriously, they’re the kind of treat that makes people close their eyes and smile after the first bite.

What sets my Funfetti Oreo Cookie Bars apart? I’ve spent way too many hours testing, and the secret is a perfect balance of brown sugar for chewiness, melted butter for richness, and just the right amount of baking soda to keep them soft without being cakey. I always crush the Oreos by hand, so you get big, chunky bits in every slice. And blending the sprinkles into the batter means every bite is as colorful as the last—no bland corners here!

This isn’t just another cookie bar recipe—it’s my best version, tailored for real life. Whether you want to impress your guests without stressing out or just want a quick treat for the family, these bars bring the party home. So if you’re after something that’s easy, fun, and guaranteed to bring smiles, Funfetti Oreo Cookie Bars are the answer.

Ingredients Needed

This recipe uses simple, wholesome ingredients to deliver bold flavor and that signature Funfetti crunch. The best part? Most of these are pantry staples, and you can easily swap things to fit your needs. Here’s what you’ll need:

• All-purpose flour (2 cups / 240g) – gives structure to the bars
• Baking soda (1/2 teaspoon) – keeps the bars soft but chewy
• Salt (1/4 teaspoon) – balances the sweetness

• Unsalted butter (1/2 cup / 115g, melted and cooled) – adds richness and keeps the bars moist (substitute coconut oil for dairy-free)
• Brown sugar (1 cup / 200g, packed) – brings depth and chewiness
• Granulated sugar (1/4 cup / 50g) – for the right amount of sweetness

• Large egg (1, room temperature) – binds everything together (use flax egg for vegan option)
• Vanilla extract (2 teaspoons) – rounds out the flavor (I recommend Nielsen-Massey for the best taste)

• Rainbow sprinkles (1/2 cup / 80g) – the heart of funfetti! (Use jimmies, not nonpareils, to avoid color bleeding)
• Oreo cookies (14 cookies, roughly chopped) – brings crunch and chocolatey layers (classic or Golden Oreos both work)

Ingredient Tips:

• Try using mini Oreos if you want more cookie in every bite—just a fun twist for the kids.
• If you want to make these gluten-free, swap the flour for a 1:1 gluten-free blend and use gluten-free sandwich cookies.
• Mix up the sprinkles for seasonal events: red and green for Christmas, pastels for Easter, or school colors for graduation.
• I’ve swapped in coconut sugar for brown sugar in a pinch—works just fine, but the bars get a slightly different flavor.
• Don’t have butter? Vegetable oil works, but the bars are a bit less rich.

All in all, these ingredients keep things simple but make every bite exciting. You don’t need a specialty store, just a little creativity and what’s already in your pantry.

Equipment Needed

You don’t need much to whip up Funfetti Oreo Cookie Bars, and I love that—minimal fuss, maximum results. Here’s what you’ll use:

• 9×13-inch baking pan (or 22x33cm) – makes perfect, party-sized bars. A glass pan gives crisp edges; metal pans bake a bit faster.
• Parchment paper – for easy removal and no sticking. If you don’t have it, grease well with butter or nonstick spray.
• Large mixing bowl – you’ll combine everything here.
• Whisk – for mixing wet ingredients (a fork works in a pinch).
• Spatula – helps fold in Oreos and sprinkles gently.
• Measuring cups and spoons – accuracy counts for chewy bars.
• Sharp knife – for chopping Oreos and slicing bars.

If you don’t have a 9×13 pan, an 8×8-inch pan works—just bake a few minutes longer for thicker bars. I’ve baked these in a disposable aluminum pan for parties, too. For cleaning, soak sticky utensils in warm water to make washing up easy. If budget is tight, dollar store measuring cups and spatulas do the trick!

Preparation Method

Here’s how to make Funfetti Oreo Cookie Bars—step by step. I promise, it’s easy and fun. Grab your ingredients, and let’s get baking!

1. Prep the Pan: Line your 9×13-inch baking pan with parchment paper, leaving a slight overhang on the sides for easy lifting. Or grease generously if you’re skipping the paper. Preheat your oven to 350°F (175°C).
2. Mix Dry Ingredients: In a large mixing bowl, whisk together 2 cups (240g) all-purpose flour, 1/2 teaspoon baking soda, and 1/4 teaspoon salt. Set aside.
3. Combine Wet Ingredients: In another bowl, whisk 1/2 cup (115g) melted unsalted butter (make sure it’s cooled a bit, or it’ll scramble the egg), 1 cup (200g) brown sugar, and 1/4 cup (50g) granulated sugar until smooth. Beat in 1 large egg and 2 teaspoons vanilla extract until well combined—about 1 minute.
4. Bring Together: Pour the wet mixture into the dry ingredients. Stir with a spatula or wooden spoon until just combined—don’t overmix, or the bars get tough.
5. Add the Fun: Fold in 1/2 cup (80g) rainbow sprinkles and 14 roughly chopped Oreo cookies. Be gentle—crushing Oreos too much makes the bars less chunky. The batter will be thick and a little sticky.
6. Spread & Smooth: Scoop the batter into your prepared pan. Use a spatula (or clean hands—kids love this part) to spread it evenly all the way to the edges. Press in a few extra Oreo chunks and sprinkles on top if you want more color.
7. Bake: Slide the pan into your preheated oven. Bake for 22–26 minutes, or until the edges are golden and a toothpick inserted in the center comes out mostly clean (a few moist crumbs are perfect). Bars will look soft in the center but firm up as they cool.
8. Cool Completely: Set the pan on a wire rack and let the bars cool completely—at least 30 minutes. If you try to slice too soon, the bars may fall apart. (Trust me, patience pays off!)
9. Slice & Serve: Lift the bars out using the parchment overhang. Cut into 20 squares. If they’re a little sticky, clean your knife between slices for neat edges.

Notes & Troubleshooting:

• If the bars seem underdone, just let them cool—residual heat continues to set them.
• Bars too dry? Double-check your flour measurement (spoon and level, don’t scoop!).
• Sprinkles bleeding color? Try jimmies, not nonpareils.
• If you want extra gooey bars, pull them out at 22 minutes and let them finish setting in the pan.

Honestly, after dozens of batches, I’ve learned that letting the bars cool is the secret to perfect slices. Don’t rush—your patience will be rewarded!

Cooking Tips & Techniques

Here’s where experience makes the difference with Funfetti Oreo Cookie Bars. I’ve botched a few batches and learned what really works.

• Room Temperature Ingredients: Make sure your egg isn’t straight from the fridge—it blends better, so the bars bake evenly.
• Melted Butter, Not Hot: If the butter is too hot, it’ll cook the egg and ruin the texture. Let it cool (I’ve made that mistake more than once!).
• Don’t Overmix: Mix just until ingredients are combined. Overworking the dough makes the bars tough and crumbly.
• Gentle Folding: When adding Oreos and sprinkles, fold gently—otherwise, the Oreos break down and sprinkles bleed color.
• Bake Time: Watch closely. Bars go from perfectly chewy to dry fast. Edges should be golden; center looks just set.
• Cooling: Let the bars cool completely in the pan to set—if you slice too soon, they’ll fall apart. I’ve rushed it before and ended up with cookie crumbles!
• Clean Cuts: Use a sharp knife and wipe between slices for perfectly neat squares. I sometimes use a bench scraper—works like a charm.

Multitasking tip: While the bars bake, clean up your bowls and prep plates for serving. You’ll be ready the moment they’re cooled. For consistent results, use a kitchen scale for your flour and sugars—makes a big difference in texture. And if you’re making these for a party, you can make them the night before; flavors actually get better overnight!

Variations & Adaptations

Cookie bars are all about fun and flexibility! Here are some of my favorite ways to customize Funfetti Oreo Cookie Bars:

• Gluten-Free: Use a 1:1 gluten-free flour blend and swap Oreos for gluten-free sandwich cookies. The bars stay chewy and delicious—my niece can vouch for that.
• Holiday Theme: Switch out rainbow sprinkles for seasonal colors: red and green for Christmas, pinks and reds for Valentine’s Day, or orange and black for Halloween.
• Chocolate Lovers: Add 1/2 cup chocolate chips or chunks to the batter—extra gooey and rich.
• Birthday Cake Bars: Use Golden Oreos and add 1/4 teaspoon almond extract with the vanilla for classic birthday cake flavor.
• Vegan Adaptation: Swap the butter for vegan margarine, use a flax egg (1 tablespoon ground flaxseed + 2.5 tablespoons water), and dairy-free sandwich cookies. Works surprisingly well!
• Nutty Crunch: Add 1/2 cup chopped walnuts or pecans for a little extra crunch.

I’ve tried swapping out Oreos for peanut butter sandwich cookies once, and it became a new family favorite. Don’t be afraid to experiment—this recipe is forgiving, and every batch is a little different (in a good way!).

Serving & Storage Suggestions

Funfetti Oreo Cookie Bars are best served at room temperature, sliced into squares or rectangles for easy snacking. Pile them onto a colorful platter with extra sprinkles on top for party vibes!

• Serving: These bars pair perfectly with a cold glass of milk, vanilla ice cream, or even a cup of coffee. For parties, stack them on a tiered tray.
• Storage: Keep bars in an airtight container at room temperature for up to 4 days. If you want to keep them longer, freeze individual squares wrapped in parchment and placed in a zip bag—up to 2 months.
• Reheating: Warm bars in the microwave for 10–15 seconds to revive that gooey texture, or pop in a low oven for a few minutes.
• Flavor Over Time: Bars taste even better on day two—the flavors meld, and the texture gets chewier. I love sneaking one for breakfast the next morning!

If you’re taking them to a party, wrap the bars tightly and transport in a sturdy container. They hold up well and don’t crumble easily—another reason I love them for events!

Nutritional Information & Benefits

Each Funfetti Oreo Cookie Bar (based on 20 bars per batch) is approximately:

• Calories: 180
• Fat: 8g
• Carbohydrates: 26g
• Sugar: 16g
• Protein: 2g

The main health benefit here is happiness—seriously, these bars lift spirits at any gathering! Brown sugar brings minerals like potassium, and Oreos add crunch and fun. For dietary needs, you can make them gluten-free or dairy-free with simple swaps. Allergens to watch for: wheat, gluten, dairy, eggs. I’ve made vegan and gluten-free versions for friends, and they always turn out chewy and flavorful.

From a wellness perspective, these bars are definitely a treat—not an everyday snack—but they fit into special occasions where joy and sharing matter most.

Conclusion

If you’re hunting for a show-stopping, easy-to-make dessert that makes people smile, Funfetti Oreo Cookie Bars are a must-try. They’re colorful, chewy, and bursting with party energy—perfect for kids, grown-ups, and anyone who loves a little whimsy in their day.

Customize them to fit your crew’s taste, theme, or dietary needs. That’s the fun of it! I keep coming back to this recipe because it’s always reliable, always delicious—and honestly, it’s just plain fun to make.

Give these bars a whirl, share your own twists in the comments, and let me know if they become your new party favorite. Tag me on social media with your best creations—let’s spread some sprinkle joy together!

Frequently Asked Questions

Can I use different types of Oreos in Funfetti Oreo Cookie Bars?

Absolutely! Golden Oreos, Double Stuf, or any fun flavor you like will work. Just chop them up and fold into the batter as usual.

Can I make Funfetti Oreo Cookie Bars ahead of time?

Yes, these bars actually taste better the next day. Bake, cool, slice, and store in an airtight container overnight for extra chewy texture.

How do I keep my Funfetti Oreo Cookie Bars soft?

Don’t overbake! Pull them out when the edges are golden and the center is just set, then cool completely before slicing.

Can I freeze these cookie bars?

Yes! Wrap individual bars in parchment and store in a zip bag in the freezer for up to 2 months. Thaw at room temp or microwave for a few seconds.

What’s the best way to cut neat squares?

Let the bars cool completely, then use a sharp knife. Wipe the blade between cuts to keep edges clean.

Funfetti Oreo Cookie Bars

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• Author: Savannah Collins
• Total Time: 40 minutes
• Yield: 20 bars 1x

Print Recipe

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Description

Funfetti Oreo Cookie Bars are chewy, buttery dessert bars loaded with crunchy Oreo pieces and rainbow sprinkles. They’re quick to make, festive, and perfect for parties or any occasion that needs a little extra fun.

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Ingredients

Scale 1x2x3x

• 2 cups all-purpose flour
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup unsalted butter, melted and cooled
• 1 cup packed brown sugar
• 1/4 cup granulated sugar
• 1 large egg, room temperature
• 2 teaspoons vanilla extract
• 1/2 cup rainbow sprinkles (jimmies)
• 14 Oreo cookies, roughly chopped

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Instructions

1. Line a 9×13-inch baking pan with parchment paper, leaving an overhang for easy lifting, or grease generously. Preheat oven to 350°F (175°C).
2. In a large mixing bowl, whisk together flour, baking soda, and salt. Set aside.
3. In another bowl, whisk melted butter, brown sugar, and granulated sugar until smooth. Beat in egg and vanilla extract until well combined.
4. Pour wet mixture into dry ingredients. Stir with a spatula or wooden spoon until just combined; do not overmix.
5. Fold in rainbow sprinkles and chopped Oreo cookies gently.
6. Spread batter evenly into prepared pan. Press in extra Oreo chunks and sprinkles on top if desired.
7. Bake for 22–26 minutes, until edges are golden and a toothpick inserted in the center comes out mostly clean.
8. Cool completely in the pan on a wire rack for at least 30 minutes.
9. Lift bars out using parchment overhang and slice into 20 squares. Clean knife between slices for neat edges.

Notes

For best results, use room temperature egg and cooled melted butter. Do not overmix the batter to keep bars chewy. Use jimmies sprinkles to avoid color bleeding. Let bars cool completely before slicing for clean cuts. Bars can be made gluten-free or vegan with simple swaps. Store in an airtight container for up to 4 days or freeze for up to 2 months.

• Prep Time: 15 minutes
• Cook Time: 22–26 minutes
• Category: Dessert
• Cuisine: American

Nutrition

• Serving Size: 1 bar
• Calories: 180
• Sugar: 16
• Sodium: 70
• Fat: 8
• Saturated Fat: 5
• Carbohydrates: 26
• Protein: 2

Keywords: funfetti, oreo, cookie bars, party dessert, easy baking, chewy bars, birthday treat, homemade bars, sprinkles, kids dessert