Cadbury Mini Egg Chocolate Cake

Name: Cadbury Mini Egg Chocolate Cake
Prep time: 25 min
Cook time: 35 min
Total time: 1 h
Cuisine: American
Ingredients: 2 cups flour; 2 cups sugar; ¾ cups unsweetened cocoa powder; 2 teaspoons baking powder; 1½ teaspoons baking soda; 1 teaspoon salt; 1 teaspoon espresso powder; 1 cup buttermilk; ½ cup vegetable oil; 2 large eggs; 2 teaspoons vanilla extract; 1 cup boiling water; 1½ cups butter (softened); 1 cup unsweetened cocoa powder; 5 cups confectioners sugar; ½ cup milk; ½ teaspoon espresso powder; ½ cup Cadbury mini eggs crushed; 2 cups Cadbury mini eggs (top decoration)