Bake the Cake Layers:

• Preheat oven to 340°F (170°C). Grease and line three 6-inch cake pans.
• Sift dry ingredients together in a bowl. In a separate bowl, mix milk, sour cream, and vanilla.
• Cream butter and sugar until fluffy, then add egg whites one at a time.
• Alternate adding dry ingredients and milk mixture, mixing until combined.
• Divide batter evenly into pans and bake for 25-30 minutes, until a toothpick comes out clean.
• Let cakes cool completely before frosting.

Prepare the Buttercream Frosting:

• Beat butter and shortening until smooth and creamy.
• Gradually add powdered sugar, alternating with milk, until fully incorporated.
• Mix in vanilla extract and blue food coloring until the desired shade is achieved.

Assemble & Frost the Cake:

• Stack cake layers, spreading buttercream between each.
• Apply a thin crumb coat and chill for 15 minutes.
• Frost the cake smoothly using a bench scraper.

Create the Speckled Effect:

• Mix cocoa powder with vanilla extract or vodka to form a thin paste.
• Dip a food-safe brush into the mixture and flick speckles onto the cake for a realistic egg effect.

Decorate with Chocolate Eggs:

• Arrange chocolate eggs around the base of the cake.
• Pipe buttercream on top and place additional eggs to create a nest-like design.