In a large bowl, cream butter and sugars until light and fluffy. Add the eggs, one at a time, beating well after each addition. Beat in milk and vanilla. Combine the oats, flour, baking soda, salt, cinnamon, mace, nutmeg and cloves; gradually add to creamed mixture and mix well. Stir in the remaining ingredients.
Spread into a greased 15x10x1-in. baking pan. Bake at 375° for 25-30 minutes or until golden brown. Cool on a wire rack. Cut into bars.