If you’re looking for a dessert that’s bursting with color, flavor, and pure joy, this Easy Funfetti Cake Batter Cookie Bars Recipe is your new best friend. Imagine the classic funfetti cake turned into a chewy, soft cookie bar that’s easy to whip up and perfect for sharing. With every bite loaded with rainbow sprinkles and topped with a smooth, sweet frosting, these bars are guaranteed to bring out smiles and warm memories, whether you bake them for a party or a cozy night in.

Ingredients You’ll Need

A rectangular baked snack with a golden-brown top layer speckled with small colorful bits of blue, pink, red, and green is shown inside a clear glass baking dish with slightly browned edges. The baking dish is placed on a white marbled surface covered partly by a colorful zigzag cloth with stripes of green, orange, red, purple, and blue. The baked item’s texture looks soft and slightly uneven with some wrinkles and smooth edges. Photo taken with an iphone --ar 4:5 --v 7

The beauty of this recipe is how straightforward and accessible the ingredients are. Each component plays an important role: from the sugar cookie and funfetti cake mixes providing that perfect base and colorful texture, to the butter and eggs adding richness and moisture. The powdered sugar and milk come together to create a creamy frosting that finishes these bars in the most delightful way.

Sugar cookie mix (1 lb. pouch): The foundation of chewy, buttery cookie texture.
Funfetti cake mix (15.75 oz box): Adds sweetness and those iconic rainbow sprinkles throughout the batter.
Eggs (3): Bind everything together, giving the bars structure without drying them out.
Butter (2 sticks melted + 1 stick softened): Melted butter enriches the batter, while softened butter makes for a creamy frosting base.
Vanilla extract (1 tablespoon + 1 tablespoon): Elevates the flavor in both the batter and frosting with its warm, sweet aroma.
Rainbow sprinkles (1/4 cup + 1/4 cup): Essential for that funfetti magic, brightening the bars inside and out.
Powdered sugar (1 1/2 cups): Turns the frosting luscious and sweet, balancing the texture perfectly.
Milk (2 tablespoons + optional): Thins the frosting to the ideal spreadable consistency.

How to Make Easy Funfetti Cake Batter Cookie Bars Recipe

Step 1: Preheat and Prepare Your Pan

Start by heating your oven to 350 degrees Fahrenheit. Lightly spray a 9 x 13 inch baking dish with cooking spray so your cookie bars release easily after baking. This step ensures even cooking and keeps cleanup simple.

Step 2: Mix the Batter

In a large bowl, combine the sugar cookie mix, funfetti cake mix, eggs, melted butter, and vanilla extract. Stir until the ingredients are thoroughly blended into a smooth, colorful batter with a lovely spark of rainbow sprinkles dancing through it.

Step 3: Fold in the Sprinkles

Gently fold in your 1/4 cup of rainbow sprinkles to distribute vibrant pops of color throughout the batter without overmixing. This little touch brings the funfetti bars to life!

Step 4: Pour and Spread Batter

Transfer the batter to your prepared baking pan, smoothing it out into an even layer. This ensures your bars bake uniformly, with that signature puffy center and golden edges you’re aiming for.

Step 5: Bake Until Golden

Bake for 30 to 35 minutes. Keep an eye on those edges—they’ll turn a beautiful golden brown when the bars are ready. The center should be slightly puffy and set but still soft to the touch.

Step 6: Let Cool

Allow your baked bars to cool completely on a wire rack. Cooling is key for the frosting to set properly without melting into the warm bars.

Step 7: Make the Frosting

Using a hand mixer, beat the softened butter in a large bowl until creamy and fluffy. Then gradually add the powdered sugar, more vanilla, and milk. Mix on high speed for about a minute until the frosting is smooth and spreadable. Adjust with additional milk if it seems too thick.

Step 8: Frost and Sprinkle

Once your bars are cool, spread the frosting evenly on top. Don’t forget to add another generous sprinkle of rainbow sprinkles to make these bars as dazzling on top as they are inside.

Step 9: Slice and Serve

Cut the frosted tray into 30 bars—perfectly bite-sized for sharing. Serve and watch everyone’s faces light up with every colorful, chewy, and sweet bite!

How to Serve Easy Funfetti Cake Batter Cookie Bars Recipe

A rectangular glass baking dish filled with two main layers is shown: the bottom layer is a light brown cake, and the top layer is a thick, smooth, bright pink frosting spread evenly across the cake. The frosting is decorated with colorful rainbow sprinkles scattered all over. The glass dish sits on a white marbled surface with a vibrant zigzag patterned cloth in shades of green, orange, purple, and blue beneath it. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

To make these cookie bars truly pop, top them with extra sprinkles, edible glitter, or even tiny candy pearls. Fresh berries or a drizzle of white chocolate can add a gourmet touch if you’re feeling fancy but the sprinkles alone are a surefire crowd-pleaser.

Side Dishes

Pair these bars with a cold glass of milk or a scoop of vanilla ice cream for a classic combination. For a brunch or dessert table, a light fruit salad or whipped cream can complement their sweetness beautifully without overwhelming.

Creative Ways to Present

Serve these Easy Funfetti Cake Batter Cookie Bars Recipe bites on colorful platters or festive plates that highlight their vibrant sprinkles. Wrapping individual bars in parchment paper or placing them in cupcake liners works great for grab-and-go parties or gift-giving.

Make Ahead and Storage

Storing Leftovers

Keep any leftover bars in an airtight container at room temperature for up to 3 days. This keeps them soft and moist while preserving the fresh frosting and sprinkle crunch.

Freezing

If you want to keep these bars longer, wrap them individually or in airtight containers and freeze for up to 3 months. Thaw overnight in the fridge before serving to maintain their chewy texture and frosting integrity.

Reheating

For a warm treat, microwave a single bar for about 10-15 seconds. This softens the cookie and makes the frosting delightfully melty and irresistible, but avoid overheating or the frosting may lose its charm.

FAQs

Can I use gluten-free mixes for this recipe?

Absolutely! Using gluten-free sugar cookie and funfetti cake mixes will yield tasty bars for those with gluten sensitivities, just be sure the mixes are designed to be used as directed in baking recipes.

What if I don’t have rainbow sprinkles?

No worries, you can use any type of sprinkles or even mini chocolate chips. The bars will still taste fantastic, but the funfetti look might be a little less colorful.

Can I make these bars dairy-free?

Yes, swap the butter for a dairy-free alternative such as margarine or coconut oil and use dairy-free milk in the frosting. The texture will be slightly different but still scrumptious.

How do I prevent the sprinkles from bleeding color?

Gently folding in the sprinkles helps avoid breaking them up, which reduces color bleeding. Using high-quality sprinkles designed for baking also minimizes this issue.

Are these bars very sweet? Can I reduce the sugar?

The bars have a sweet, celebratory flavor, but you can experiment by slightly reducing powdered sugar in the frosting. Keep in mind it may affect texture and stability slightly. Taste as you go!

Final Thoughts

I cannot recommend this Easy Funfetti Cake Batter Cookie Bars Recipe enough for bringing a little sparkle and happiness to any occasion. It’s a simple recipe with spectacular results—colorful, chewy, creamy, and infinitely shareable. Give it a try and watch how these rainbow-filled bars light up your day and everyone’s smiles around you!