Toll House? Fudge

2 tablespoons butter
1 1/2 cups granulated sugar
2/3 cup evaporated milk
1/4 teaspoon salt
2 cup miniature marshmallows
1 1/2 cups semisweet chocolate chips
1 cup chopped walnuts
1 teaspoon vanilla extract

Bring butter, sugar, evaporated milk and salt to a boil in medium-size, heavy saucepan over medium heat, stirring constantly. Boil for 4 to 5 minutes, stirring constantly.

Remove from heat. Stir in marshmallows, morsels, walnuts and vanilla extract. Stir vigorously until marshmallows are melted. Pour into foil-lined 8-inch square pan. Sprinkle with walnuts if desired.

NOTE: You may substitute butterscotch chips for chocolate chips.