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Everything Birthday Sheet Cake

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  • Prep 25 min
  • Total 1 hr 50 min
  • Servings 24
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This sprinkle-packed sheet cake is 100 percent birthday. It starts with classic rainbow chip cake, gets frosted with vanilla buttercream, and topped with an explosion of regular and birthday cake Oreo™ cookies, plus graham crackers and a confetti cannon’s worth of sprinkles.
Created Jun 1, 2018
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  • 1 box Betty Crocker™ Super Moist™ rainbow bit cake mix
  • Water, vegetable oil and eggs called for on cake mix box

  • 1/2 cup butter, softened
  • 4 1/2 cups icing sugar
  • 1 1/2 teaspoons vanilla
  • 4 to 5 tablespoons milk

  • 5 Oreo™ birthday cake sandwich cookies, chopped (if available, otherwise substitute regular Oreo™ cookies)
  • 5 Oreo™ sandwich cookies, chopped
  • 1/2 cup teddy bear-shaped birthday cake graham snacks (from 10-oz box)
  • 1 tablespoon rainbow-coloured sprinkles


  • 1
    Heat oven to 350°F. Spray bottom of 15x10x1-inch pan with cooking spray.
  • 2
    In large bowl, make cake batter as directed on box. Pour into pan. Bake 20 to 25 minutes or until toothpick inserted in centre comes out clean. Cool completely, about 1 hour.
  • 3
    In large bowl, mix softened butter, icing sugar, vanilla and 4 tablespoons milk with electric mixer on medium speed until smooth and creamy. If frosting is too stiff to spread, add additional milk, 1 teaspoon at a time.
  • 4
    Spread frosting over cooled cake, and top immediately with Toppings. To serve, cut into 6 rows by 4 rows.

Expert Tips

  • Tip 1
    Trademarks referred to herein are the properties of their respective owners.
  • Tip 2
    Cake is best served the same day, as cookie topping will begin to soften after a day.
  • Tip 3
    For best success with this recipe, be sure to use a 15x10-inch pan with at least a 1-inch rim so there is less risk of cake batter spilling over while baking.

Nutrition Information

280 Calories, 11g Total Fat, 1g Protein, 43g Total Carbs

Nutrition Facts

Serving Size: 24
Total Fat
Saturated Fat
Trans Fat
Total Carbs
Dietary Fiber
% Daily Value*:
*Percent Daily Values are based on a 2,000 calorie diet.
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