Process oats in a blender or food processor until ground.
Beat butter and sugars at medium speed with an electric mixer until fluffy. Add eggs and vanilla; beat until blended.
Combine ground oats, flour, and next 3 ingredients. Add to butter mixture, beating until blended. Stir in chocolate and pecans.
Drop dough by tablespoonfuls onto ungreased baking sheets.
Bake at 375° for 7 to 8 minutes or until golden brown; remove to wire racks to cool.