Heat oven to 375 F. Spray 12 regular-size muffin cups with cooking spray.
In medium bowl, stir all ingredients except whipped topping until blended. Pour ¼ cup of mixture into each muffin cup.
Bake about 30 minutes or until muffin tops are golden brown and edges are starting to pull away from sides of pan. Cool 10 minutes. With thin knife, loosen sides of pies from pan; remove from pan and place top sides up on cooling rack. Cool 10 minutes longer, and serve with 1 generous tablespoonful whipped topping.