Pumpkin Streusel Squares
["1 3/4 c. unsifted flour", "1/3 c. packed brown sugar", "1/3 c. granulated sugar", "1 c. cold margarine or butter, cut into small pieces", "2 c. pumpkin (one 16 oz. can)", "1 c. chopped nuts", "1 (14 oz.) can sweetened condensed milk", "2 eggs", "1 tsp. ground cinnamon", "1/2 tsp. ground allspice", "1/2 tsp. salt (optional)"]
["Preheat oven to 350\u00b0.", "In medium bowl, combine flour and sugars.", "Cut in margarine until crumbly.", "Stir in nuts.", "Reserving 1 cup crumb mixture, press remainder firmly on bottom and halfway up sides of 12 x 7-inch baking dish."]
["flour", "brown sugar", "sugar", "cold margarine", "pumpkin", "nuts", "condensed milk", "eggs", "ground cinnamon", "ground allspice", "salt"]