Preheat your oven to 400 degrees. Take out a 9 x 13 glass baking pan and place the butter in the pan. Once your oven is preheated, place your pan in the oven and let the butter melt completely.
Mix eggs, sugar, milk, salt and vanilla together with a mixer or hand held mixer. Stir for 2-3 minutes or until smooth.
Add the flour. Stir for 2-3 minutes.
Pour the mixture into your 9 x 13 glass baking pan (with the melted butter in it).
Bake at 400 degrees for 35-40 minutes or until lightly brown.
Sprinkle with sugar when done. (Optional)
Let cool for 5 minutes and serve with syrup and enjoy!