I remember a version of these that my mother used to make when I was growing up. She also made the unbelievable rice crispy treats that were layered with chocolate and peanut butter. My mouth is watering. You can use crunchy peanut butter for texture or add in fresh crushed peanuts too.
1/4 cup/60ml/50g brown sugar
1/4 cup/2 ounces/57g unsalted butter
1/4 cup/1.2 ounces/32g confectioners sugar
2 tablespoons/30ml bakers cocoa powder