Hardtack is a dense bread that has minimal water and can last months without modern refrigeration. It is true to its name and has a reputation for being hard as brick. Historically, it has helped armies and sailors make long trips by packing wooden casks with this hard bread.
Making it is simple and it requires only whole wheat flour, salt and water.
First, measure 4 cups of flour. 4 cups of flour weighs 480 grams.
Next, measure 2 cups of water and dissolve 4 teaspoons of salt into it.
Then, mix the water slowly into the flour until it is a stiff dough. All the water may not be used. The dough should not be sticky but instead firm and moldable.
Roll out the dough to a thickness of ½ inch. Cut 3 inch square pieces and press into the dough holes similar to store bought crackers.
Put the hardtack on a un-greased pan and bake at 375 for 30 min. flip and bake for another 30 min.They will keep for a year or longer if stored air tight.