Follow these simple steps to create your Mini Easter Egg Cakes:

1. Preheat your oven to 350°F (175°C) and prepare a mini cupcake pan with liners.
2. Mix Dry Ingredients: In a bowl, sift together the flour, cocoa powder (if using), baking powder, baking soda, and salt.
3. Cream Butter and Sugar: In another bowl, beat the softened butter and granulated sugar until light and fluffy.
4. Add Eggs and Vanilla: Mix in the eggs one at a time, followed by the vanilla extract until well combined.
5. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, alternating with the milk. Mix until smooth and well incorporated.
6. Fill the Pan: Spoon the batter into the mini cupcake liners, filling each about two-thirds full.
7. Bake: Place in the oven and bake for 20-25 minutes or until a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and allow the cakes to cool in the pan for 5 minutes before transferring them to wire racks to cool completely.
9. Prepare the Frosting: In a bowl, cream the softened butter and powdered sugar. Gradually add the milk until you reach a smooth and creamy consistency.
10. Color the Frosting: Divide the frosting into small bowls and add food coloring to create your desired shades.
11. Decorate: Once the cakes are completely cooled, frost each mini cake with your colored frosting and top with mini chocolate eggs or other decorations.