Pumpkin Bars And Frosting
["2 c. flour", "2 tsp. baking powder", "1 tsp. baking soda", "1/2 tsp. salt", "2 tsp. cinnamon", "1 tsp. pumpkin pie spice", "2 c. sugar", "1 c. oil", "4 eggs", "1 (16 oz.) can pumpkin", "1 c. chopped nuts"]
["Combine all ingredients and mix well.", "Pour into a lightly greased 17 x 11 x 3/4-inch pan.", "Bake in preheated 350\u00b0 oven for 20 to 22 minutes or until top springs back when touched.", "Partially cool, then top with frosting."]
["flour", "baking powder", "baking soda", "salt", "cinnamon", "pumpkin pie spice", "sugar", "oil", "eggs", "pumpkin", "nuts"]