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Funfetti Blondies are a fun and delicious dessert that will rock your taste buds – in a good way! These made-from-scratch homemade sprinkle blondies are fast and easy – and taste like cake without using cake mix.

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stacked cookie bars with colorful rainbow sprinkles baked in and sprinkled on top

BEST Funfetti Blondies From Scratch

These confetti blondies are on our radar all year long. We’ve made these cake batter bars for birthdays, holidays, and fun weekend treats. The one consistency that we’ve found with these cake batter blondie brownies is that there’s never anything left at the end of the day! 

We love making these sprinkle cookie bars without a cake mix because they give an amazing melt-in-your-mouth result. 

Why you’ll love this recipe!

  • They taste like cake without using cake mix!
  • A single batch of funfetti bars can really feed a crowd
  • If you want to prep this recipe ahead of time, it’s simple and easy to do! 
  • They taste a bit like chewy chocolate chip cookies! 
ingredients in funfetti bars laid out on a counter top with words saying the names of the ingredients

Ingredients in Confetti Blondies

All you need to make this cake batter blondie recipe is listed below. Gather up the ingredients and get started – I promise they’re totally worth it! 

  • Unsalted butter – If you only have salted butter, omit adding the extra salt ingredient. Make sure the butter is softened. 
  • Brown sugar – Pack it tightly when measuring it. 
  • Granulated sugar – Gives these cookie bars an extra boost of sweetness. 
  • Eggs – Large eggs act as the main binding agent to create the cookie bar batter. 
  • Baking powder – Adds a fluffiness to the bars as they bake. 
  • Salt – Just a pinch. 
  • Vanilla extract – Pure vanilla extract works best. 
  • Butter extract or Cake Batter Extract – Gives the funfetti bars the cake flavor. 
  • All-purpose flour – If you are worried about lumps with the flour, you can sift it first. 
  • Sprinkles – Use ALL the sprinkles! 
  • Powdered sugar – Needed to make the homemade frosting. 
  • Milk – Used to help thin out the frosting to find the best consistency. 

How to make Funfetti Blondies

  • Cream the sugars: Add both sugars and butter into a bowl. Mix until fluffy.
  • Mix: Add the eggs, salt, baking powder, and extracts. 
  • Add the flour: Add the flour slowly and mix.
  • Then fold in the sprinkles.
  • Add to pan: Pour the batter into the prepared pan and press it down. The batter will be sticky, so adding some non-stick spray to your hands will help. 
  • Bake: Put the pan into the oven and bake for 22-25 minutes. 
  • Make the frosting: Beat the sugar and butter until it’s a crumbly texture. Then add the milk and vanilla. Mix until it’s smooth. Fold in sprinkles. 
  • Frost the bars: Once the bars have cooled after baking, add the frosting and top with more sprinkles. 


  • Add some mini chocolate chips, chocolate chips, white chocolate chips – or anything else that has chocolate as part of the time. (If you do want to make funfetti white chocolate brownies, just omit the frosting and use 2 cups of white chocolate chips instead!)
  • For an extra added crunch, stir in some chopped nuts like pecans, walnuts, or even peanuts for a salty kick. 
funfetti bars laid out on parchment paper with rainbow sprinkled sprinkled on top

Storing and Freezing Instructions

Store these cake batter blondies in an airtight container for up to 3 days. If you want to freeze them, they’ll last for up to 3 months. 


Why are my blondies crumbling?

If your confetti cake bar recipe is crumbling after being baked, it means that it was baked for too long. Pay attention to the top of the cookie bar as it should be a golden brown coloring, indicating that it’s done. 

How long to bake blondies?

This cake batter blondie recipe should be baked for anywhere between 22-25 minutes. This is the “sweet spot” that should cause baking perfection. 

Are blondies supposed to be gooey?

Yes, this is why these are better than Pillsbury funfetti blondies! Because the center is slightly ooey and gooey and delicious! 
Keep in mind, however, that as the cookie bars cool, they will firm up a bit.  

What sprinkles are best for funfetti desserts?

Use any type of sprinkles that you like! There are a variety of shapes and sizes, so have fun! I like using the rainbow variety, so it adds many fun pops of color. 

Where do I buy cake batter extract?

McCormick makes cake batter extract, and it’s sold in grocery stores and online. You can also find other brands of this flavor extract at craft stores.

Best Blondie Recipes

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stacked cookie bars with colorful rainbow sprinkles baked in and sprinkled on top

Funfetti Blondies

5 from 15 votes
A great soft blondie topped with a sweet frosting and colorful sprinkles that the entire family will love!
Prep Time 30 minutes
Cook Time 25 minutes
Total Time 55 minutes
Yield 24 servings
Serving Size 1 serving



  • ½ cup (113g) unsalted butter, softened
  • 1 cup (200g) packed brown sugar
  • ½ cup (100g) granulated sugar
  • 2 large eggs
  • 1 teaspoon baking powder
  • ½ teaspoon salt
  • 1 teaspoon vanilla extract
  • 1 teaspoon butter extract
  • 2 cups (242g) all-purpose flour
  • ½ cup (90g) sprinkles


  • ½ cup (113g) unsalted butter, softened
  • 2 cups (226g) powdered sugar
  • 1 teaspoon vanilla extract
  • 1-2 tablespoons milk
  • ¼ cup (45g) sprinkles, plus more for topping
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  • Preheat oven to 350°F. Line a 9×13-inch baking pan with foil or parchment and spray with nonstick cooking spray.
  • Cream butter and both sugars together with an electric mixer until smooth and fluffy, about 1-2 minutes. Mix in eggs and baking powder, salt, and extracts.
  • Slowly mix in flour until combined, then stir in sprinkles.
  • Press batter in prepared pan (it will be sticky; spray your hands with cooking spray to avoid it sticking).
  • Bake 22-25 minutes or until light golden around the edges and it’s just lost its glossy sheen. Don’t over bake – these will set as they cool.
  • Make the frosting: Beat butter and sugar until crumbly, then add vanilla and 1 tablespoon milk. Mix until you’ve reached the desired consistency, adding more milk 1 teaspoon at a time. Stir in sprinkles.
  • Frost bars and top with sprinkles. Slice and serve.
  • Store loosely covered in an airtight container for up to 3 days. Freeze for up to 3 months.

Recipe Video

Recipe Notes

  • You can substitute vegan butter sticks for both the bars and frosting to make these non-dairy.
  • Substitute almond for butter extract if needed. Or, use cake batter extract (a McCormick extract flavor).
  • You can use any kind of milk for the frosting (fat free, regular, nondairy or even heavy cream). You’ll need more milk depending on the fat content (higher fat content needs more liquid). The amount you use will also depend on how soft the butter is when you start making the frosting (softer butter = less milk, etc)

Recipe Nutrition

Serving: 1serving | Calories: 304kcal | Carbohydrates: 54g | Protein: 3g | Fat: 9g | Saturated Fat: 5g | Polyunsaturated Fat: 0.5g | Monounsaturated Fat: 2g | Trans Fat: 0.3g | Cholesterol: 35mg | Sodium: 59mg | Potassium: 61mg | Fiber: 1g | Sugar: 38g | Vitamin A: 267IU | Calcium: 24mg | Iron: 1mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American
stacked cookie bars with colorful rainbow sprinkles baked in and sprinkled on top with words on the image

Funfetti Blondies are the best Cake Batter Cookie Bars from scratch – make homemade rainbow sprinkle cookie bars with cake batter flavor and tons of the best vanilla frosting.

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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1 Comment

  1. My little grandson’s love sprinkles! I am going to bake a batch when I see them in a few weeks. Thanks for sharing recipe.