Spinach Squares
["4 Tbsp. butter", "3 eggs", "1 c. flour", "1 c. milk", "1 tsp. salt", "1 tsp. baking powder", "1 lb. shredded Cheddar cheese", "2 pkg. frozen chopped spinach, thawed and drained", "1 Tbsp. chopped onion"]
["Preheat oven to 350\u00b0.", "Put butter in 13 x 9-inch pan and melt in oven.", "Remove.", "In large bowl, beat eggs well, then add flour, milk, salt and baking powder.", "Mix well.", "Add cheese, spinach and onion.", "Mix well and spoon in pan.", "Bake 35 minutes.", "Remove and cool for 45 minutes.", "Cut in squares.", "Freezes well."]
["butter", "eggs", "flour", "milk", "salt", "baking powder", "Cheddar cheese", "spinach", "onion"]