Chocolate Pinwheel Cookies
["1/2 c. shortening", "1/3 c. butter, softened", "1 Tbsp. butter, softened", "2 egg yolks", "1/2 tsp. vanilla flavoring", "1 pkg. Duncan Hines fudge marble cake mix"]
["Combine shortening, 1/3 cup butter, egg yolks and vanilla in a large bowl.", "Mix on low speed until blended. Set aside cocoa packet.", "Gradually add cake mix.", "Blend well.", "Divide dough. Add cocoa packet and remaining 1 tablespoon butter to half of the dough.", "Knead until well blended.", "Roll out yellow dough between 2 pieces of wax paper.", "Roll into rectangular shape. Repeat for chocolate dough.", "Remove wax paper. Lay yellow dough on top of chocolate dough.", "Roll up like jelly roll, rolling from wide side. Put in refrigerator for 2 hours."]
["shortening", "butter", "butter", "egg yolks", "vanilla flavoring", "Duncan"]