Preheat your oven to 350°F (175°C).

In a large mixing bowl, beat the softened butter, sugar, and brown sugar until smooth and creamy (about 2-3 minutes).

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

In another bowl, whisk together the flour, baking soda, and salt. Gradually incorporate this into the wet ingredients and mix until just combined.

Gently fold in the mint chocolate chips and chopped mint leaves (if using).

Using a cookie scoop or tablespoon, drop rounded dough onto a lined baking sheet, spacing them about 2 inches apart.

Bake for 10-12 minutes, or until the edges are lightly golden. The centers may appear slightly under-baked.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack.