In a bowl, take 45 gms brown sugar, 45 gms caster sugar, 50 gms butter and mix well. Add 1 egg, 40-50 gms peanut butter and mix well. In another bowl, take 75 gms flour, 1/4 tsp baking powder, 1/4 tsp baking soda and mix well. Add the dry ingredients to the wet ingredient bowl and mix well. Add 40-50 gms dark chocolate and mix again. Scoop out the batter on baking tray lined with butter paper. Bake it in a preheated oven at 180'C for 10-15 minutes. Chocolate Peanut Butter Cookies are ready.