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Rainbow Surprise Inside Cake

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  • Prep 30 min
  • Total 3 hr 25 min
  • Servings 16
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We've got a show-stopping dessert for you: it's a fun cake filled with a colorful, sweet surprise that tumbles out when you cut into it! This Rainbow Surprise Inside Cake will be a hit at birthday parties, holiday gatherings and other celebrations. You can even play with the colors of the candy filling to customize it for the occasion.
Updated Jul 25, 2023
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Ingredients

Steps

  • 1
    Heat oven to 350°F (325°F for dark or nonstick pans). Spray bottom and sides of 2 (8-inch) round cake pans; line with cooking parchment paper. In large bowl, beat 1 box cake mix and ingredients called for on box with electric mixer on medium speed for 2 minutes, scraping bowl occasionally. Divide batter between pans. Bake as directed on box for 8-inch round cake pans. Cool 10 minutes. Remove from pans to cooling rack; remove parchment paper. Cool completely, about 1 hour. Meanwhile, repeat mixing and baking with second box of cake mix to make 2 more layers.
  • 2
    Flatten cake layers by trimming off rounded tops. In 2 layers, cut small round out of center, using 4-inch round cutter.
  • 3
    To assemble cake: Place 1 uncut cake layer on cake stand or serving platter; spread 1/3 cup frosting on top. Top with 1 layer with center removed; spread 1/3 cup frosting on top. Top with second layer with center removed; spread 1/3 cup frosting on top.
  • 4
    In small bowl, mix chocolate candies and sprinkles. Fill cake with candies and candy sprinkles. Gently press candies to level; top with full cake layer. Frost side and top of cake with remaining frosting. Store loosely covered at room temperature.

Tips from the Betty Crocker Kitchens

  • tip 1
    Don’t have a 4-inch round cutter for this rainbow surprise cake recipe? Cut out a 4-inch circle of cooking parchment paper and use it as a pattern.
  • tip 2
    Be sure to cool cake pans completely, then wash, dry and spray with cooking spray before baking the second cake mix.
  • tip 3
    To pipe frosting mounds on top of your rainbow surprise cake, tint some of the frosting with Betty Crocker™ Gel Food Color to desired color. Fit a decorating bag with 1/2-inch round piping tip and fill with tinted frosting. Pipe frosting mounds around top edge of cake.
  • tip 4
    An easy and quick way to fill the inside of the cake with candies and sprinkles mixture is to use a 1/2 cup measuring cup.

Nutrition

630 Calories, 32g Total Fat, 5g Protein, 80g Total Carbohydrate, 63g Sugars

Nutrition Facts

Serving Size: 1 Serving
Calories
630
Calories from Fat
290
Total Fat
32g
50%
Saturated Fat
14g
72%
Trans Fat
0g
Cholesterol
75mg
25%
Sodium
280mg
12%
Potassium
125mg
4%
Total Carbohydrate
80g
27%
Dietary Fiber
1g
4%
Sugars
63g
Protein
5g
% Daily Value*:
Vitamin A
4%
4%
Vitamin C
0%
0%
Calcium
10%
10%
Iron
6%
6%
Exchanges:
1 Starch; 0 Fruit; 4 1/2 Other Carbohydrate; 0 Skim Milk; 0 Low-Fat Milk; 0 Milk; 0 Vegetable; 0 Very Lean Meat; 0 Lean Meat; 0 High-Fat Meat; 6 1/2 Fat;
Carbohydrate Choice
5
*Percent Daily Values are based on a 2,000 calorie diet.
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