In a small pot, melt margarine, peanut butter and sugar. stir till the sugar is dissolved and mix is smooth. remove from heat, pour batter into a mixing bowl and add flour. mix and let refrigerate for about 1-1 1/2 hour.(dough should be dough like.) once dough has chilled roll into 1in balls. melt chocolate chips with the milk in a sauce pan on low flame. roll balls into melted chocolate and let it sit back in the refrigerator for 10 minutes. *to cover with nuts; after dipping the balls into chocolate roll into a bowl of your favorite nut and then let it sit for 10minutes in fridge.