Preheat the oven to 350°F (175°C).

Line baking sheets with parchment paper.

In a mixing bowl, cream together the softened butter, granulated sugar, and brown sugar for 2-3 minutes until light and fluffy.

Add the eggs and peppermint extract, beating until fully incorporated.

In a separate bowl, whisk together the flour, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined.

Fold in the chocolate chips and crushed peppermint candies if using.

Scoop the dough onto the prepared baking sheets, spacing them about 2 inches apart.

Bake for 9-11 minutes, until the edges are golden and the centers are soft.