Ingredients You’ll Need
For the Cake:
- 2 ¾ cups all-purpose flour
- 1 ½ teaspoons baking powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- 1 cup unsalted butter (softened)
- 2 cups granulated sugar
- 4 large eggs
- 1 tablespoon vanilla extract
- 1 cup buttermilk
- Food colouring (red, orange, yellow, green, blue, purple)
For the Frosting:
- 1 cup unsalted butter (softened)
- 4 cups powdered sugar
- ¼ cup heavy cream
- 1 teaspoon vanilla extract
Step-by-Step Instructions
Preparing the Cake Batter:
- Preheat your oven to 350°F (175°C). Grease and line six 8-inch cake pans with parchment paper.
- Whisk together flour, baking powder, baking soda, and salt in a bowl.
- Cream butter and sugar in a separate bowl until light and fluffy. Add eggs one at a time, followed by vanilla extract.
- Gradually mix the dry ingredients into the wet ingredients, alternating with buttermilk.
- Divide the batter evenly into six bowls. Add a few drops of food colouring to each bowl to create vibrant rainbow colours.
- Pour each coloured batter into its respective cake pan and bake for 15-20 minutes or until a toothpick inserted into the centre comes out clean.
Assembling the Rainbow Cake:
- Let the layers cool completely before assembly.
- Prepare the frosting by beating butter, powdered sugar, heavy cream, and vanilla extract until smooth.
- Stack the layers in rainbow order, spreading a thin layer of frosting between each layer.
- Frost the outside of the cake and smooth it out for a clean finish. Decorate as desired.
Nutritional Information (Per Slice, Approx. 12 Slices)
- Calories: 450
- Protein: 4g
- Fat: 20g
- Saturated Fat: 12g
- Carbohydrates: 63g
- Sugar: 45g
- Fiber: 1g
- Cholesterol: 90mg
- Sodium: 210mg
Pro Tips for Perfect Results
- Use gel food colouring for more vibrant colours.
- Chill the cake layers in the refrigerator before frosting to prevent crumbs.
- Add sprinkles or edible glitter for an extra festive touch.
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