This is a simple recipe of 1 part by weight starter, 2 parts by weight water and 3 parts by weight flour. Salt is 2% of the flour weight or 0.06 parts by weight. This recipe can be enriched for sandwich bread or buns easily by using milk instead of water and adding sugar and oil. This makes two 1 lb loaves. To make 2 medium loaves, increase ingredients by 50 %. This recipe as written can also make 1 large, 2 lb loaf free-standing or in a 9" x 5" loaf pan. Flo is a pretty french lady on another site who developed the 1-2-3 formula.