PREHEAT oven to 350° F. Grease 15 x 10-inch jelly-roll pan.
COMBINE flour, baking powder, cinnamon and salt in medium bowl. Beat sugar, butter and vanilla extract in large mixer bowl. Add eggs one at a time, beating well after each addition. Beat in pumpkin. Gradually beat in flour mixture. Spread into prepared pan.
BAKE for 20 to 25 minutes or until wooden pick inserted in center comes out clean. Cool completely in pan; spread with Maple Icing. Cut into bars.
FOR MAPLE ICING:
BEAT 6 ounces softened cream cheese, 2 tablespoons softened butter or margarine and 2 cups sifted powdered sugar in small mixer bowl until smooth. Add 1 to 2 teaspoons maple flavoring.