How To make Pumpkin Squares

2 1/4 c Flour
2 1/2 ts Baking powder
1/2 ts Baking soda
1/2 ts Nutmeg
1/2 ts Allspice
4 Eggs;
1 c Sugar
1 c Brown sugar
3/4 c Butter;melted
1/2 c Nuts;chopped
1 1/2 c Mincemeat
1 lb Pumpkin
Sift together first 5 engredients. Set aside. Beat eggs and sugars together will; add remaining ingredients. Add dry ingredients and mix just enough to combine ingredients. Pour into a greased 13x9x2 55 to 60 minutes. Cool, and then frost with Cream Cheese Frosting. Cut into 35 squares.