Brown the butter in a medium saucepan over medium heat for 3-4 minutes until golden brown and nutty.

Prepare dry ingredients by whisking together flour, coffee powder, cinnamon, salt, baking powder, and baking soda.

Combine wet ingredients: mix granulated sugar, brown sugar, and browned butter, then add vanilla and egg.

Mix dry ingredients into the wet mixture until just combined.

Fold in white chocolate chips until evenly distributed.

Shape the dough into balls of about 1.5 to 2 tablespoons each and place on a lined baking sheet.

Bake in a preheated oven at 350°F (175°C) for 9-10 minutes until puffed and edges are set.

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