Melt margarine in large saucepan over low heat. Add choco chips and melt. Add peanut butter and caramel, stir to blend, add marshmallows. Stir constantly til all is smooth.

Remove from heat and add Rice Krispies. Stir til Krispies are covered.

Spray 9 x 13 pan with cooking spray, spread Krispie mix in pan, flatten and cool. When cool, cut into 12 pieces.