Preheat oven to 180°C (350°F).

Mix melted butter, granulated sugar, and brown sugar until smooth.

Add vanilla and eggs, mix well.

Stir in flour, baking soda, and salt until just combined.

Fold in your chosen treats.

Scoop dough into small patties onto a baking tray.

Bake for 10-12 minutes until edges are lightly golden.

Cool on a rack before serving.