Combine butter, evaporated milk, sugar and salt
in medium, heavy saucepan. Bring to a boil
over medium heat, stirring constantly.
Boil for 4 1/2 to 5 minutes, stirring constantly.
Remove from heat. Stir in marshmallows, morsels,
nuts and maple flavoring. Stir vigorously for
1minute or until marshmallows are melted.
Pour into foil-lined 13x9-inch baking pan.
Place walnut halves in rows, spacing about
1/2" apart on top of fudge.
Press into fudge. Chill until firm.
Cut into squares with 1 walnut half per square.
(Makes about 50 pieces)