Place foil or paper baking cup in each of 9 regular-size muffin cups. Mix cookie crumbs and butter; firmly press about 1 tablespoon mixture in bottom of each baking cup.
In medium bowl, mix yogurt and chocolate syrup until well mixed. Spoon and spread about 3 tablespoons yogurt mixture over crumbs in each cup. Gently spread about 1 tablespoon whipped topping on each.
Freeze until firm, at least 1 hour. Garnish with chopped candies.