Shrewsburg Squares
["1 c. sugar", "1 c. butter or margarine", "1 egg", "3 c. flour", "1/2 tsp. salt", "2 tsp. baking powder", "1 tsp. vanilla", "jam (any jam may be used)"]
["Cream butter and sugar.", "Add remaining ingredients. Take 1/2 and spread in greased 8 x 8-inch pan.", "Put layer of jam on top. Then add remainder of mixture.", "Sprinkle with white sugar.", "Bake in a 350\u00b0 oven until delicate brown.", "Cut in squares."]
["sugar", "butter", "egg", "flour", "salt", "baking powder", "vanilla"]