At one time, sailors lived mostly on hardtack that was made from only flour, water, and salt; it was baked hard and dry for long storage. Sea biscuits were made by mixing 5 cups oatmeal, 6 cups flour, 3 tsp. salt, and 2 tsp. baking soda. Separately 3 cups buttermilk were mixed with 6 Tbs. honey and 1 cup of melted lard. The ingredients were mixed, rolled flat, and baked.