Preheat oven to 400 degrees F. Melt the butter or margarine in a 9-inch square baking pan. In a medium bowl, beat together the eggs and ¼ cup of the milk. In another bowl, sift together the flour, sugar, baking powder, and salt, and add to the egg and milk mixture. Slowly add the remaining 1 cup milk and mix. Pour over the melted butter in the pan and bake 20 minutes.