Deep Dish Apple Pie Upside-Down Cake

Source: Recipe by: "Mrs. Smith"

1 Mrs. Smith's Deep Dish Apple Pie, baked
    according to package directions and cooled
1 (18.25 oz.) box yellow pound cake mix
1 1/2 cups caramel sauce
3 tablespoons butter
2 cups whipped cream
1 green apple for garnish, cored and sliced
8 individual-serving-size bake-proof ramekins or souffl