LINE 13 x 9-inch baking pan with foil leaving an overhang on two sides. Spray foil with nonstick cooking spray.
HEAT marshmallows, butter and salt in large, heavy-duty saucepan over medium-low heat, stirring frequently, for 5 to 10 minutes, until smooth. Remove from heat. Add 1 cup morsels; stir until melted.
WORKING QUICKLY, stir in corn flakes, coconut and remaining 2/3 cup morsels until coated. Spread mixture into prepared baking pan with greased spatula, pressing down lightly. Cool for 2 hours or until set. Lift from pan; remove foil. Cut into bars with serrated knife.
• For a delicious variation, substitute 2 cups (12-oz. package) NESTLE® TOLL HOUSE® Premier White Morsels or 1 3/4 cups (11.5-oz. package) NESTLE® TOLL HOUSE® Milk Chocolate Morsels for Butterscotch Flavored Morsels.
• To toast coconut, bake at 350º F until light golden brown, about 8 to 10 minutes, stirring frequently.