In a large bowl, cream the butter and brown sugar. Beat in eggs and mincemeat. Combine the flour, baking soda, cinnamon, salt and nutmeg; add to the creamed mixture and mix well. Fold in chocolate chips and walnuts if desired.
Drop by tablespoonfuls 2 in. apart onto greased baking sheet. Bake at 350° for 10-12 minutes or until golden brown. Remove to wire racks to cool. Yield: about 4 dozen.