Surprise! How To Make This Sweet Pinata Cake

Ingredients

• 1 1/2 cups unsalted butter
• 1 3/4 cups superfine sugar
• 6 large eggs
• 2 2/3 cups all-purpose flour
• 2 1/2 teaspoons baking powder
• 1 teaspoon fine salt
• 1 teaspoon vanilla extract
• 4 tablespoons whole milk
• 2 1/4 cups unsalted butter
• 7- 7 1/4 cups powdered sugar
• 1 teaspoon vanilla extract pink food coloring paste (or your chosen color)
• 35 ounces colorful mixed candies