Snicker Bar Apple Salad

1 large box instant vanilla pudding
1 cup milk
1 (12 ounce) container frozen whipped topping, thawed
6 large apples, unpeeled, cored and diced
6 (2.15 ounce) Snickers candy bars, chilled and sliced fairly thin
Green or red seedless grapes (optional)

Prepare the pudding using 1 cup milk. Gently fold pudding into the whipped topping. Don't over-stir. Fold in apples, candy bars and grapes, if using. Refrigerate until chilled.