In a large bowl, cream the butter, peanut butter and sugars until light and fluffy. Beat in eggs and vanilla. Combine the flour, baking soda and salt; gradually add to creamed mixture and mix well. Stir in chocolate chips and peanut butter cups., Drop by rounded tablespoonfuls 2 in. apart onto ungreased baking sheets. Bake at 350° for 10-12 minutes or until edges are lightly browned. Cool for 2 minutes before removing to wire racks.