Preheat oven to 350. In a large mixing bowl, beat together butter, peanut butter, sugar and brown sugar, until fluffy. Add eggs and vanilla. Combine flour, baking powder, and soda, and add to peanut butter mixture, beating until combined. Divide dough into 60 equal pieces. This is made simpler by first dividing into 6 pieces, then each of those into 10 pieces. For each cookie, shape a piece of dough around a candy piece, forming a ball. Place on ungreased cookie sheet. Bake for 10 to 12 minutes or until lightly browned. Cool on a rack. 60 cookies