Confetti Sheet Cake
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Updated Apr 13, 2026
If you’re looking for a fun, crowd-pleasing dessert for a celebration, this Confetti Sheet Cake is hard to beat. It’s soft, colorful, and topped with a thick layer of creamy frosting and sprinkles, perfect for graduation parties and any moment worth celebrating!
Frequently Asked Questions
Yes! You can bake and frost the cake a day in advance. Cover and store at room temperature, then add sprinkles right before serving for the best look.
Yes! This cake is just as delicious with Betty Crocker™ Rich & Creamy Chocolate Frosting or Cream Cheese Frosting if you want to switch up the flavor!
Store leftovers covered at room temperature for up to 2 days or in the refrigerator for up to 4 days. Let the cake come to room temperature before serving for the best texture.
Confetti Sheet Cake
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- Prep Time 20 min
- Total 1 hr 45 min
- Servings 12
- Ingredients 6
Ingredients
Sheet Cake
- 1 box Betty Crocker™ Delights Super Moist™ Party Rainbow Chip Cake Mix
- 1 cup whole milk, left at room temperature for 20 to 30 minutes
- 1/3 cup vegetable oil
- 3 large eggs, left at room temperature for 20 to 30 minutes
Frosting
- 2 tubs (16 oz) Betty Crocker™ Rich & Creamy Vanilla Frosting
- 1/4 cup rainbow sprinkles
Instructions
-
Step1
Heat oven to 350°F. Grease a 13x9-inch pan with cooking spray.
-
Step2
In a large bowl, whisk cake mix, milk, oil, and eggs for about 1 minute until smooth. Pour batter into pan; spread evenly.
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-
Step3
Bake 25 to 30 minutes or until a toothpick inserted in the center comes out clean. Remove cake from oven to a cooling rack. Cool completely, about 1 hour.
-
Step4
Spread 1 tub of frosting in a thick layer over the top of the cooled cake.
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-
Step5
Fit one decorating bag with a large star piping tip (such as 847, 1M, or 4D) and one decorating bag with a small star piping tip (such as 32). Divide the second tub of frosting between the two decorating bags. Pipe a boarder around the outside of the cake with the large star tip. Pipe a second boarder just inside the first boarder with the small star piping tip. Sprinkle boarders with rainbow sprinkles.
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-
Step6
To serve, cut the cake into squares.
Nutrition
Nutrition Facts are not available for this recipe
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