Bring a splash of color and a touch of magic to your next celebration with this enchanting Rainbow Unicorn Cake! Featuring vibrant layers and a delicious Twinkie-inspired filling, this cake is sure to dazzle guests and make any occasion feel special.
Ingredients:
- For the Cake:
- 1 cup + 6 tbsp unsalted butter, softened
- 1¾ cups granulated sugar
- 3 cups all-purpose flour
- 1 tsp baking powder
- ½ tsp baking soda
- ½ tsp salt
- 2 tsp vanilla extract
- 4 large eggs, room temperature
- 1 cup buttermilk
- Various food colorings for the rainbow effect
- For the Filling:
- 7.5 oz marshmallow fluff
- 1/4 cup unsalted butter, softened
- 2 tsp vanilla extract
- For the Frosting:
- 1/4 cup unsalted butter, softened
- 2 cups powdered sugar
- ¼ cup whole milk, more as needed
- Sprinkles for decoration
Directions:
- Prepare the Cake:
- Preheat your oven to 350°F (177°C). Generously butter and flour a bundt cake pan to ensure easy release after baking.
- In a large mixing bowl, cream together butter and sugar until light and fluffy. Beat in the eggs one at a time, then stir in vanilla extract.
- In another bowl, whisk together the flour, baking powder, baking soda, and salt.
- Gradually alternate adding the dry ingredients and buttermilk to the butter mixture, starting and ending with the flour mixture.
- Divide the batter evenly into four separate bowls. Color each with a different food coloring to create vibrant layers.
- Carefully spoon each colored batter into the prepared pan, smoothing out each layer before adding the next to maintain distinct colors.
- Baking:
- Bake the cake for 50-55 minutes or until a toothpick inserted comes out clean. Allow the cake to cool in the pan for about an hour before inverting onto a wire rack to cool completely.
- Prepare the Filling:
- For the Twinkie-inspired filling, mix marshmallow fluff, butter, and vanilla extract until smooth. Carefully make holes at the bottom of the cooled cake and pipe the filling inside using a pastry bag.
- Frosting and Decoration:
- To make the frosting, beat butter until creamy. Gradually add powdered sugar and milk until you reach a smooth and spreadable consistency. If the frosting is too thick, add a little more milk.
- Frost the cooled cake and decorate with colorful sprinkles to enhance the unicorn theme.
Tips for Success:
- Layer the cake batter gently to prevent the colors from mixing and to achieve a clean, layered look.
- Ensure the cake is completely cooled before filling and frosting to prevent the ingredients from melting or seeping out.
- Use a narrow utensil or the back of a wooden spoon to create even holes for the filling, ensuring they are spaced well but hidden once the cake is turned right side up.