Broccoli Bars
["4 Tbsp. butter", "3 eggs", "1 c. flour", "1 c milk", "1 tsp. salt", "1 tsp. baking powder", "1 lb. Cheddar cheese, grated", "1 (10 oz.) pkg. frozen chopped broccoli, thawed and drained well", "1 small onion, chopped", "1/2 c. chopped mushrooms"]
["Melt butter in 9 x 13-inch pan.", "Mix all ingredients except butter together and pour in pan with butter, spread evenly (do not mix butter in).", "Bake at 350\u00b0 for 30 to 35 minutes.", "Can also be made with spinach.", "Substitute spinach for broccoli."]
["butter", "eggs", "flour", "milk", "salt", "baking powder", "Cheddar cheese", "broccoli", "onion", "mushrooms"]