Preheat oven to 350 F. Grease and line two baking sheets.
In a bowl cream butter, peanut butter and sugars. Beat in the egg.
Blend in pancake and baking mix. Fold in nuts.
Mix until it forms a dough.
Get portions of dough (about 30 grams each) and form into balls.
Roll the dough and place a brownie square at the center. Cover it with the whole dough and form again into a ball.
Fill a bowl with candy sprinkles or white chocolate chips. Roll each ball to cover.
Place on cookie sheets and flatten lightly with the palm of the hand.
Bake for 12 minutes.