Pumpkin pie spice gives the streusel topping an incredible flavor that really complements the delicate lemony flavor of the cake.
1 Preheat oven to 350 degrees F. Cream together butter and cream cheese. Gradually add sugar, beating until light and fluffy. Add eggs, one at a time, mixing well. Stir in mace and lemon extract.
2 Sift flour with baking powder, soda and salt. Add alternately with milk to butter mixture. Pour into a greased and floured 9x13x2-inch baking pan.
3 Combine topping ingredients until crumbly. Sprinkle over batter. Bake 35 minutes or until done. Cool. Cut into 2 x 3-inch pieces.