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

Cream butter and sugars together in a large mixing bowl until light and fluffy. This step is crucial for texture.

Add eggs and vanilla, mixing until fully combined.

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

Gradually add dry ingredients to the wet mixture, stirring gently to avoid overmixing.

Fold in chocolate chips (and nuts, if using). The dough should be thick but scoopable.

Scoop dough into tablespoon-sized balls and place them 2 inches apart on prepared sheets.

Bake for 9–11 minutes, until the edges are golden but centers are still slightly soft.

Cool on the baking sheet for 5 minutes before transferring to a wire rack.