Great Pumpkin Spice Cake
["1 pkg. spice cake mix (dry)", "2 tsp. baking soda", "1 (30 oz.) can pumpkin pie mix (as is; do not mix anything in)", "1/3 c. water", "2 eggs"]
["Dissolve soda in water.", "Combine ingredients and pour in a greased 9 x 13-inch pan.", "Bake at 350\u00b0 for 45 to 50 minutes or until tests done."]
["spice cake", "baking soda", "pumpkin pie mix", "water", "eggs"]