Mix flour, sugar, baking soda, and salt together. Then blend in Crisco and peanut butter until course crumbly mixture. Add syrup and milk. Mix well. Roll into 2 inch roll. Cut into 1/4 inch slices place one slice onto baking sheet and put peanut butter on it. Then cover with another slice. Fork all the way around the edges. Bake at 300°F for 18 minutes.