Name: Chocolate Butter Cookies
Prep time: 40 mins
Cook time: 15 mins
Yield: 12
Ingredients: 2 1/2 sticks butter, (90 g) each; 1 egg yolk; 1 cup icing sugar; 1/4 teaspoons salt; 2 cups flour; 1 tablespoon cornstarch; 2 tablespoons whipping cream; 1/2 teaspoons vanilla essence; 1 stick bittersweet chocolate, worn, to decorate