Wash, quarter, core and cut the apples into pieces.
Mix the flour, baking powder and baking soda in a bowl.
In a second bowl, mix the eggs, sugar, peanut butter, melted butter, and buttermilk very well until the mixture is uniform. Add flour mixture and apple pieces and stir in again briefly.
Fill 2/3 of the dough into the molds and bake for 20-25 minutes at 190 ° C top / bottom heat.