German Pancakes

I make these every Christmas morning and when we had our chickens and I had a ton of eggs to get rid of. We all love them. It is very good with some powdered sugar sprinkled on top.
6 eggs
1 cup milk
1 cup flour
1/2 teaspoon salt
1/2 teaspoon vanilla
5 Tablespoons melted butter

Put butter in the pan and put in oven while you prepare everything else. Beat eggs in a blender until fluffy, add milk, flour, salt and vanilla. Pour batter in puddles over butter. Bake at 450 for 15-20 minutes. I put mine in my large cast iron but a 9x13 pan would work too.