Go Back
+ servings
Easy Homemade Rainbow Cake Slice on White Plate With Turquoise Background

Easy Rainbow Cake (With Cake Mix)

Print Recipe
Easy rainbow cake recipe, homemade with simple ingredients. Starts off with cake mix! Soft and moist cake layers are filled with whipped cream and topped off with sprinkles and colorful candies.
Course Dessert
Cuisine American
Keyword birthday cake, doctored cake mix recipe, homemade cake
Prep Time 10 mins
Cook Time 30 mins
Decorating time 20 mins
Total Time 1 hr
Servings 9 Slices
Calories 196
Author Abeer Rizvi


  • 3 Eggs Large
  • 1/3 cup Butter Unsalted, Melted
  • 1/2 cup Milk Whole or 2%
  • 1/2 cup Water
  • 1 box White cake mix Or yellow cake mix
  • Food coloring Red, orange, yellow, green, blue, purple
  • 4 cups Whipped cream Or Cool Whip
  • 1/4 cup M&m candies Mini size
  • 2 tbsp Rainbow sprinkles


  • In a large mixing bowl, mix together eggs, butter, milk, water until smooth.
  • Add cake mix and mix until just combined.
  • Divide batter into 6 separate bowls.
  • Add a different color in each bowl and mix each batter until color is evenly distributed. 
  • Drop spoonfuls of colored batter randomly in two round cake pans (Dimensions: 8x2). Pans should be lined with parchment paper and the sides should be greased.
  • Use a toothpick to swirl the colored batter.
  • Bake at 350 degrees F for 30-40 minutes or until an inserted toothpick in the center comes out clean. 
  • Let the cakes cool completely.
  • While they are cooling, prepare whipped cream.
  • Trim off the cake domes (if any) and sides of the cake with a serrated knife.
  • Place one cake on a cake dish.
  • Use a spatula to spread whipped cream on top.
  • Then, place the other cake on top and press gently to secure it into place.
  • Use a spatula to spread whipped cream on top.
  • Toss m&m candies and sprinkles on top and enjoy.


  • Read all my tips above.
  • Leftovers can be stored in a sealed container in the fridge for up to  3 days.


Calories: 196kcal | Carbohydrates: 10g | Protein: 3g | Fat: 16g | Saturated Fat: 10g | Trans Fat: 1g | Cholesterol: 95mg | Sodium: 93mg | Potassium: 79mg | Fiber: 1g | Sugar: 9g | Vitamin A: 507IU | Vitamin C: 1mg | Calcium: 60mg | Iron: 1mg