Preheat the oven to 350°F (175°C)
Mix softened butter, sugar, and brown sugar until smooth
Add eggs and vanilla extract
In a separate bowl, combine flour, baking soda, and salt
Gradually mix the dry ingredients into the wet ingredients
Stir in chocolate chips or other mix-ins
Scoop dough onto a lined baking sheet
Bake for 8 to 12 minutes
Let cookies cool on the baking sheet for a few minutes
Transfer cookies to a wire rack to cool completely