1 can (14 oz.) Carnation Sweetened Condensed milk
1 tsp. vanilla extract
3 cups miniature marshmallows
1-1/2 cups coarsely chopped walnuts
Microwave morsels and sweetened condensed milk in large, uncovered, microwave-safe bowl on High (100%) power for 1 minute; stir. Morsels may retain some of their original shape. If necessary, microwave at additional 10-15 seconds intervals, stirring just until morsels are melted. Stir in vanilla extract. Fold in marshmallows and nuts.
Press mixture into prepared baking pan. Refrigerate until ready to serve. Lift from pan; remove foil. Cut into pieces.