Preheat the oven to 180°C and line two oven trays with baking paper.
Beat the butter and brown sugar together until light and fluffy using a cake mixer. Add the peanut butter and egg, and beat until combined.
Sift in the Bin Inn Gluten Free Flour and Bin Inn Gluten Free Baking Powder. Stir into the creamed mixture until thoroughly combined.
Spoon tablespoonfuls of the mixture into balls and place on the baking trays, leaving room for spreading.
Bake for 8–10 minutes, then remove from the oven and sprinkle with chopped chocolate buttons and peanuts. Return to the oven and bake for an additional 3–4 minutes, or until golden.
