Preheat your oven to 350°F (175°C) and line a muffin tin with cupcake liners.

In a bowl, whisk together the flour and baking powder.

In another bowl, cream the softened butter and sugar until light and fluffy. Add the eggs one at a time, mixing in the vanilla afterward.

Gradually add the dry ingredients to the wet mixture, alternating with milk until just combined; add green food coloring until you reach your desired shade.

Fill each cupcake liner two-thirds full with batter and bake for 18-20 minutes or until a toothpick inserted comes out clean.

Allow cupcakes to cool completely before frosting them with green buttercream.