֍ Apple muffins with chocolate, apples and nuts ֍

For cooking you need:
֍ butter 100 g
֍ sugar 70 g
֍ eggs 3 pcs
֍ flour 150 g
֍ baking powder 1 tsp
֍ walnuts 50 g
֍ chocolate 80 g
֍ apple 1 pc