Kittencal'S Spinach Appetizer Squares - cooking recipe

Ingredients

3 large eggs
1 cup milk
1 cup all-purpose flour
1 teaspoon garlic powder
1/2 teaspoon seasoning salt (or to taste, can use white salt)
1/2 teaspoon fresh ground black pepper
1 pinch cayenne pepper
1 teaspoon baking powder
2/3 cup grated parmesan cheese, divided
1 small onion, finely chopped
4 cups shredded cheddar cheese
1 (10 ounce) package frozen chopped spinach (cooked according to package directions then hand-squeezed dry)
6 tablespoons butter, cut into cubes (no subsitutes)

Preparation

Set oven to 350 degrees F.
Generously grease a 13 x 9-inch baking dish with cooking spray.
In a large bowl whisk the eggs until frothy.
Add in milk, flour, garlic powder salt, pepper, cayenne, baking powder and 1/3 cup Parmesan cheese whisking vigorously until well blended (can use an electric mixer if desired).
Using a spoon mix in spinach until blended, then mix in the chopped onion and shredded cheddar cheese.
Place the butter in the baking pan then place in the oven to melt (about 10-12 minutes).
Transfer/spread the mixture into the hot baking pan over the butter.
Sprinkle the top with 1/3 cup or more parmesan cheese.
Bake for about 30-35 minutes or until firm and golden brown (for a more crispy square bake longer).
Cool slightly then cut into small squares removing each square using a spatula (these will slice easier when cooled they may be rewarmed again when ready to serve).