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Funfetti Cake Bars

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Cue the confetti—these Funfetti Cake Bars are bringing the party!

With colorful sprinkles baked right in and a soft, buttery bite that tastes like pure celebration, they’re the ultimate treat for birthdays, bake sales, or any day that needs a little extra joy.

No forks, no fuss—just grab, bite, and smile.

this recipe ⇨

Ingredients

For the bars:

  • 1 box (15.25 oz) vanilla or funfetti cake mix
  • 1/3 cup vegetable oil
  • 2 large eggs
  • 1/4 cup milk
  • 1/2 cup rainbow sprinkles (plus extra for topping)

For the frosting:

  • 1/2 cup (1 stick) butter, softened
  • 4 cups powdered sugar
  • 1/4 cup milk
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • Extra rainbow sprinkles for decorating
Betty Crocker Delights Super Moist French Vanilla Flavored Cake Mix, 13.25 oz
Betty Crocker Delights Super Moist French Vanilla Flavored Cake Mix, 13.25 oz
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How to Make Funfetti Cake Bars

  1. Prep: Preheat oven to 350°F. Line a 9×13 inch baking pan with parchment paper and lightly grease.
  2. Make batter: In a large bowl, mix cake mix, oil, eggs, and milk until just combined. Don’t overmix. Gently fold in 1/2 cup sprinkles.
  3. Bake: Spread batter evenly in prepared pan. Bake 25-30 minutes until a toothpick inserted in center comes out with just a few moist crumbs.
  4. Cool: Let cool completely in pan (about 1 hour).
  5. Make frosting: Beat softened butter until fluffy. Gradually add powdered sugar, then milk, vanilla, and salt. Beat until smooth and spreadable.
  6. Finish: Spread frosting over cooled bars. Top with extra sprinkles. Cut into 24 squares.

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Funfetti Cake Bars

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Brighten up any occasion with these Funfetti Cake Mix Bars! Soft, moist, and bursting with colorful sprinkles, they’re topped with a creamy vanilla frosting and more sprinkles for the ultimate festive treat.

  • Total Time: 15 minutes
  • Yield: 24 bars

Ingredients

Scale
For the bars:
  • 1 box (15.25 oz) vanilla or funfetti cake mix
  • 1/3 cup vegetable oil
  • 2 large eggs
  • 1/4 cup milk
  • 1/2 cup rainbow sprinkles (plus extra for topping
For the frosting:
  • 1/2 cup (1 stick) butter, softened
  • 4 cups powdered sugar
  • 1/4 cup milk
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • Extra rainbow sprinkles for decorating
 

Instructions

  1. Prep: Preheat oven to 350°F. Line a 9×13 inch baking pan with parchment paper and lightly grease.
  2. Make batter: In a large bowl, mix cake mix, oil, eggs, and milk until just combined. Don’t overmix. Gently fold in 1/2 cup sprinkles.
  3. Bake: Spread batter evenly in prepared pan. Bake 25-30 minutes until a toothpick inserted in center comes out with just a few moist crumbs.
  4. Cool: Let cool completely in pan (about 1 hour).
  5. Make frosting: Beat softened butter until fluffy. Gradually add powdered sugar, then milk, vanilla, and salt. Beat until smooth and spreadable.
  6. Finish: Spread frosting over cooled bars. Top with extra sprinkles. Cut into 24 squares.
  • Author: Jordan
  • Prep Time: 15 minutes

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