watermelon cake on a stand

Watermelon Cake

This adorable Watermelon Cake is frosted with buttercream to look like a watermelon and it actually has watermelon baked inside it!
Course Dessert
Cuisine America
Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Servings 16
Calories 321kcal
Author The Gunny Sack



  • Preheat oven to 350˚F. Grease two 9-inch cake pans and line bottom with parchment paper. Set aside.
  • Puree the watermelon cubes and measure out one cup of watermelon puree.
  • Put the cake mix, watermelon puree, eggs, vegetable oil, and watermelon Kool-Aid (if using) in a large mixing bowl. Mix for 30 seconds on low and then beat for 2 minutes at medium speed.
  • Divide batter between two cake pans.
  • Bake at 350˚F for 29-33 minutes. Cool for 20 minutes in the pan, remove the cakes from the pan and then cool completely on a rack.
  • Tint about 1 1/2 cups of the buttercream pink, about 3/4 cup green, and leave 1/4 cup white.
  • Place one cake on a cake round or cake stand. Frost top with about 3/4 cup of pink frosting. Add the second cake and frost the outside edges with green buttercream and then the top with the remaining pink buttercream. Put the white buttercream in a pastry bag (or ziptop bag) and snip the corner. Pipe the white frosting along the edge of the cake.
  • Press chocolate chips into the top of the cake.



Calories: 321kcal | Carbohydrates: 49g | Protein: 3g | Fat: 13g | Saturated Fat: 6g | Cholesterol: 40mg | Sodium: 269mg | Potassium: 59mg | Fiber: 1g | Sugar: 36g | Vitamin A: 145IU | Vitamin C: 1mg | Calcium: 70mg | Iron: 1mg