Spanish Squares

Ingredients:
1/4  cup butter, melted 
1  cup milk 
1  teaspoon baking soda 
1  package frozen spinach, thawed, drained and chopped 
1  cup shredded Chedder or Mozzerella cheese
3  eggs 

1  cup flour
Directions:
1.Combine eggs, milk, flour, and baking powder. Beat well.
2.Add spinach and cheese; mix well.
3.Pour melted butter into a rectangular pan.
4.Pour spinach mixture over butter and combine. Bake at 180 degrees for 35 minutes.
5.Cool 10 minutes before cutting into squares