Heat oven to 350°F. In a large food processor fitted with a metal blade or by hand, mix flour, brown sugar, wheat germ, baking soda, salt, and cinnamon. Cover and process until well combined. Add butter (use the tines of a fork if mixing by hand). Cover and process until fine crumbs form. Add honey, milk, and vanilla. Cover and process until mixture starts to hold together. If necessary, place in a bowl and work with your hands until dough is smooth. Divide in half and flatten each half to a disk.