Ingredients
Cake
- 2 boxes white cake mix
- 6 egg whites
- 1 cup milk
- 1 cup vegetable oil
- ⅓ cup yogurt (plain Greek recommended)
- 2 tablespoons lemon juice
Frosting
- 2 ½ cups butter, softened at room temperature
- 2 teaspoons vanilla extract
- ½ teaspoon salt
- 7 cups powdered sugar
- Pink, yellow, and green food coloring
Filling and Garnish
- 1 cup mini robin eggs
- 1 cup sprinkles
- 1 cup mini pastel baking chips
- Mini Cadbury Creme Eggs (optional garnish for top)
Instructions
- Prepare the Cake Pans: Line four 9-inch cake pans with parchment paper and spray with baking spray to ensure cakes do not stick. Preheat the oven to 350°F (175°C).
- Make the Cake Batter: In a large mixing bowl, combine the white cake mix, egg whites, milk, vegetable oil, yogurt, and lemon juice. Mix until all ingredients are smoothly incorporated but avoid over mixing to keep the cake tender.
- Bake the Cakes: Divide the batter evenly among the four prepared cake pans. Place in the oven and bake for approximately 22 minutes, or until a toothpick inserted in the center of each cake comes out clean. Remove from oven and allow cakes to cool completely on wire racks.
- Create the Surprise Centers: Once completely cooled, remove two of the cakes from their pans. Using a sharp knife and a 3 to 4-inch circle template (or a large circle cookie cutter), cut a circle out of the center of these two cakes to create hollow rings.
- Assemble the Cake Layers: Place one whole cake (without a hole) as the bottom layer on your cake stand. Spread a layer of white frosting on top. Next, place one cake with the hole on top and frost its surface, then add the second cake with the hole and frost it as well.
- Fill the Surprise Hole: Fill the hollow centers of the two middle cake layers with mini robin eggs, sprinkles, and mini pastel baking chips to create the surprise inside.
- Add the Top Layer and Crumb Coat: Place the final whole cake layer on top of the filled layers. Frost the top and sides of the entire assembled cake with the remaining white frosting to seal the layers together.
- Prepare Colored Frosting: Divide 1 cup of frosting into three bowls. Tint each with pink, yellow, and green food coloring until evenly colored.
- Create the Marbled Effect on the Cake Sides: Drop 2-3 teaspoon-sized dollops of the colored frostings randomly around the sides of the cake. Using an offset spatula or bench knife, gently smooth the dollops just enough to swirl the colors together without blending them completely, creating a marbled pattern.
- Decorate the Top Edge: Transfer any remaining colored frosting to a piping bag fitted with an open star tip. Pipe stars along the top edge of the cake, then garnish with mini Cadbury Creme Eggs for an extra festive touch.
- Make the Buttercream Frosting: In a stand mixer, beat the softened butter, vanilla extract, and salt together until light and fluffy. Gradually add powdered sugar, a little at a time, until the frosting reaches your desired consistency.
Notes
- Store the cake in an airtight container or cake cover at room temperature for up to three days to maintain freshness.
- Do not over mix the cake batter; mixing just until the cake mix is incorporated will keep the cake moist and soft rather than rubbery or crumbly.
- Using cake strips helps achieve flat, even cake layers. If cakes dome during baking, trim the rounded tops with a bread knife to create level layers.
- Ingredient Substitutions: Whole milk provides the best flavor, but any milk or water can be used. Plain Greek yogurt is recommended, but vanilla yogurt or sour cream can be used as alternatives. Any white cake mix brand will work. Lemon juice is optional and can be replaced with lime juice or omitted. Use vegetable, canola, or avocado oil for best results; avoid olive or coconut oil as they can alter cake flavor.
- Nutrition facts assume all the candy filling and garnishes on and inside the cake are consumed, which may overestimate typical serving intake.
- Prep Time: 25 minutes
- Cook Time: 22 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American