Shortbread Cookie Sandwich with Plum Butter & Cream Cheese Filling, dipped in Chocolate.
Turn oven to 400°F. Line baking sheet with parchment paper. Set aside.
Place 3 egg yolks, 1 cup sugar, 100 grams sour cream, 1 stick butter, Crisco and the vinegar mixture and mix until somewhat mixed. Add 3 cups flour and mix together to form a dough ball, add up to 1 more cup flour if needed to make the dough hold shape
Whip 8 oz. chilled cream until stiff peaks (take care not to overbeat) with a mixer or a whip.
Cream 1 stick butter & 1 packet cream cheese together until smooth and fluffy.