Heat oven to 350. Line a lg baking sheet w/ parchment paper. In bowl, stir oats, flour, baking powder, baking soda and salt. In another lg bowl, beat butter and peanut butter until smooth. Add both sugars, mix well. Beat in eggs and vanilla. Add oat mix to peanut butter mix, mix well. Shape into 1" balls, place on baking sheet 2" apart. Flatten w/ floured fork. Bake 8-10 min or until lightly browned.