In a mixing bowl, cream butter, peanut butter and sugars. Add eggs, one at a time, beating well after each addition. Beat in vanilla. Combine flour, oats, baking soda and salt; gradually add to the creamed mixture. Stir in chips.
Drop by rounded tablespoonfuls 2 in. apart onto ungreased baking sheets. Bake at 350° for 10-12 minutes or until lightly browned. Cool for 1 minute before removing to wire racks. Yield: 4-1/2 dozen.
Best of Country Cookies, published by Reiman Publications, 1999