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Rainbow Petal Sheet Cake

  • Prep 1 hr 20 min
  • Total 3 hr 30 min
  • Servings 12

This intricate petal design looks difficult to master, but it's actually a breeze! Try your hand at this frosting technique and use it for years (and cakes!) to come. MORE + LESS -

Ingredients

Cake

1
box yellow cake mix with pudding
Water, oil and eggs called for on cake mix box

Frosting

1 1/2
cups butter, softened
5
cups powdered sugar
2
teaspoons vanilla
2
to 4 tablespoons milk
Blue, purple, green and orange gel food color

Steps

Hide Images
  • 1
    Heat oven to 350°F (325°F for dark or nonstick pans). Grease bottom only of 1 (13x9-inch) pan. Make cake mix as directed on box using water, oil and eggs.
  • 2
    Bake 28 to 32 minutes or until a toothpick inserted in center comes out clean. Cool 10 minutes in pan; remove from pan to cooling rack. Cook completely, about 1 hour.
  • 3
    Meanwhile, beat butter with an electric mixer on low speed until creamy. Beat in the powdered sugar, 1 cup at a time, until smooth. Add vanilla and milk, 2 tablespoons at a time until well combined. If frosting is too thick, beat in more milk.
  • 4
    Use 1/2 cup frosting to frost a thin layer over entire cake. Divide remaining frosting into four bowls (about 3/4 cup frosting in each bowl). Mix blue, purple, green and orange food color, one into each bowl, until desired hue is reached.
  • 5
    Place each color in individual resealable food-storage plastic bag. Cut 1/2 inch off one corner of each bag. Pipe a dot of blue frosting and use back of teaspoon to pull frosting slightly. Repeat with remaining colors, alternating colors as you cover cake, slightly overlapping dots of frosting.

Expert Tips

  • You can resume the frosting excess that is on the back of the spoon. Just scrape it into a small bowl as you frost, then spoon back into the plastic bag to reuse.

Nutrition Information

Nutrition Facts

Serving Size: 1 Serving
Calories
650
Calories from Fat
310
% Daily Value
Total Fat
35g
53%
Saturated Fat
17g
86%
Trans Fat
1g
Cholesterol
110mg
36%
Sodium
480mg
20%
Potassium
45mg
1%
Total Carbohydrate
80g
27%
Dietary Fiber
0g
0%
Sugars
65g
Protein
2g
% Daily Value*:
Vitamin A
15%
15%
Vitamin C
0%
0%
Calcium
8%
8%
Iron
4%
4%
Exchanges:
1/2 Starch; 0 Fruit; 5 Other Carbohydrate; 0 Skim Milk; 0 Low-Fat Milk; 0 Milk; 0 Vegetable; 0 Very Lean Meat; 0 Lean Meat; 0 High-Fat Meat; 7 Fat;
Carbohydrate Choice
5
*Percent Daily Values are based on a 2,000 calorie diet.

© 2017 ®/TM General Mills All Rights Reserved

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