Cut potatoes into length-wise pieces, peeled or unpeeled.
Dip slices into melted butter, sprinkle with salt, and then roll in cracker crumbs until they are completely coated.
Lay the potato slices on a greased cookie sheet in a single layer.
Bake 40 minutes at 350, or 45 minutes for crispier fries.
Salt to taste, if needed, and dip in ketchup.