Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.

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

Add eggs one at a time, mixing thoroughly after each. Stir in vanilla extract.

In a separate bowl, whisk together flour, baking soda, and salt. Gradually incorporate the dry mixture into the wet ingredients until just combined.

Fold in rolled oats and chocolate chips. Add chopped nuts if desired.

Drop rounded balls of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake for 10-12 minutes, until edges are lightly golden. Remove from oven and let cool for 5 minutes.

Transfer cookies to a wire rack to cool completely before enjoying.