Mix flour, oats, baking soda, baking powder and salt; set aside.
Beat butter, sugars and peanut butter in large bowl on medium speed until pale and fluffy. Add egg and vanilla; mix well. Gradually add flour mixture, mixing until well blended. Stir in chocolate chips. Drop rounded tablespoonfuls of dough, 2" apart, onto ungreased baking sheets. Bake 10-12 minutes, until lightly browned on the edges. Cool 1 minute on pan, then remove to racks to cool completely.
Recipe by Hidden Ponies at https://hiddenponies.com/2011/05/saturday-sweets/