Preheat your oven to 350°F (175°C).

In a medium bowl, whisk together flour, baking powder, and salt.

In a large bowl, cream together softened butter, granulated sugar, and brown sugar until light and fluffy.

Beat in the egg and vanilla extract until just combined.

Gradually mix in the dry ingredients until fully incorporated, adding green food coloring to achieve your desired hue.

Scoop tablespoon-sized balls of dough onto lined baking sheets, spacing them about two inches apart.

Bake for 10-12 minutes or until edges are slightly golden. Let cool before serving.