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

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

In another bowl, cream the butter with granulated and brown sugar until fluffy.

Beat in the egg and vanilla until combined.

Gradually add the dry ingredients to the wet mixture, folding gently until just combined.

Stir in chocolate chips and any optional mix-ins.

Scoop generous portions onto the prepared sheets, spacing them apart.

Bake for 10-12 minutes until golden around the edges but still soft in the center. Cool slightly before enjoying.