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This Red, White, and Blue Marble Sheet Cake is made with an adapted cake box mix and topped with a whipped white chocolate frosting. It's the perfect patriotic dessert for the 4th of July!
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5 from 1 vote

Red, White, and Blue Marble Sheet Cake

This Red, White, and Blue Marble Sheet Cake is made with an adapted cake box mix and topped with a whipped white chocolate frosting. It's the perfect patriotic dessert for the 4th of July!
Prep Time20 mins
Cook Time35 mins
Total Time55 mins
Course: Dessert
Cuisine: American
Servings: 20 people
Calories: 187kcal

Ingredients

Cake:

  • 1 (15.25 oz.) box white cake mix (I use Pillsbury)
  • 1 cup all-purpose flour
  • 1 cup granulated sugar
  • 3/4 tsp salt
  • 1 1/3 cup whole milk
  • 2 tbsp vegetable oil
  • 1 tbsp pure vanilla extract
  • 3/4 cup sour cream
  • 4 large egg whites room temperature
  • Red food coloring or gel paste
  • Blue food coloring or gel paste

Frosting:

  • 2 cups heavy cream
  • 1/2 cup confectioners' sugar
  • 1/3 cup Instant White Chocolate Jell-O Pudding Mix dry

Topping:

  • Red white, and blue sprinkles

Instructions

Cake:

  • Preheat oven to 350 degrees F.
  • Spray a 9 x 13-inch pan with cooking spray (even if it's a non-stick pan).
  • In a large bowl or stand mix fitted with a whisk attachment, mix together the cake mix, flour, sugar, and salt. Add in the milk, oil, extract, sour cream, and egg whites and beat for two minutes.
  • Add 1 1/2 cups of batter to one bowl and 1 1/2 cups of batter to another bowl, add red food coloring or gel paste to one bowl and blue to the other and stir until combined. Add as much as needed to reach desired color.
  • Pour the remaining white batter into the prepared cake pan. Pour the colors, one at a time, over the white cake by zigzagging across the cake. Use a knife to run up and down the zigzags to marble the cake.
  • bake for 25 to 25 minutes until cake comes clean when a knife or toothpick is inserted into the center. Allow to cool in pan completely before frosting.

Frosting:

  • Whip frosting ingredients in a large bowl or stand mixer with a whisk attachment. A stand mixer with result in a fluffier frosting, but frosting made with a hand mixer will do just fine as well and should give you enough to over the top of the cake. Whip for 2 to 3 minutes until light and fluffy.
  • Pipe frosting onto the top of the cake and sprinkle with red, white, and blue sprinkles.

Notes

  • Mayonnaise or Greek yogurt can be use in place of the sour cream.

Nutrition

Calories: 187kcal | Carbohydrates: 20g | Protein: 2g | Fat: 11g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Cholesterol: 39mg | Sodium: 121mg | Potassium: 69mg | Fiber: 1g | Sugar: 14g | Vitamin A: 430IU | Vitamin C: 1mg | Calcium: 45mg | Iron: 1mg