Thummies (Cookies)(You May Use Your Thumb In This One.)  
["1 c. all-purpose flour", "1/3 c. sugar", "1/2 c. butter, softened", "1 egg yolk", "1/2 tsp. vanilla extract", "jam, preserves or marmalade"]
["Preheat oven to 350\u00b0.", "Mix flour, sugar and butter to a pie crust consistency.", "Add egg yolk and vanilla; mix well.", "Form into a ball and chill until firm enough to handle easily."]
["flour", "sugar", "butter", "egg yolk", "vanilla extract", "preserves"]