Spinach Cheese Squares
["1 c. flour", "1 tsp. salt", "1 Tbsp. baking powder", "2 eggs, beaten", "1/4 stick butter, melted", "1 c. milk", "1/2 c. onions, finely chopped", "1 lb. grated Cheddar cheese", "1 pkg. chopped spinach, cooked and drained"]
["Mix all ingredients together.", "Place in a buttered and floured 9 x 13-inch pan.", "Bake for 30 minutes at 350\u00b0."]
["flour", "salt", "baking powder", "eggs", "butter", "milk", "onions", "Cheddar cheese", "chopped spinach"]