Preheat oven to 350 degrees F.
In a 2-quart mixing bowl combine, sugar
, flour, salt and milk, mixing until smooth. Add egg yolks to this and mix until smooth. Add lemon juice
In a mixer
, beat egg whites until peaks are stiff. Fold the yolk mixture into whites gently to combine mixtures.
Using butter or vegetable shortening
cups. Pour the mixture into the cups. Set the cups in 1/2 inch of hot water in a 9 by 12-inch baking pan. Bake 25 minutes or until tops have risen and turn golden brown.