Preheat oven to 350°. Cut cookie dough into twelve slices, about 3/4 in. thick. On ungreased baking sheets, pat each slice to form 1/2-in.-thick circles. Bake 10-12 minutes or until golden brown. Remove to wire racks to cool completely.
Meanwhile, in a small bowl, beat cream cheese, confectioners' sugar and vanilla until blended. Spread over cookie crusts. Top with grapes.
In a microwave-safe dish, microwave marmalade, covered, on high 15-20 seconds or until warmed. Drizzle over grapes.