Medieval Fine Cakes

6 cups soft butter
1 1/2 teaspoons salt
3 cups granulated sugar
1/2 tablespoon cinnamon
12 cups unbleached flour

Cream together the sugar, salt, and butter.
Mix together the cinnamon and flour. Add this to the creamed mixture. Mix in water, as needed, to make the dough manageable.
Press dough into 2-3 baking sheets lined with baking parchment; prick all over with a fork at regular intervals.
Bake at 325 degrees F for 30 minutes; cut into 100 squares.