2 tbsp. butter
2/3 c. Carnation evaporated milk, undiluted
1 2/3 c. sugar
1/2 tsp. salt
2 c. (4 oz.) miniature marshmallows
1 1/2 c. (1 1/2, 6 oz. pkg.) semi-sweet chocolate pieces
1 tsp. vanilla
1/2 c. chopped nuts

I use half & half of semi sweet and milk chocolate chips.

Combine butter, carnation, sugar and salt in heavy saucepan over medium heat. Bring to a boil. Cook 4-5 minutes, stirring constantly (start timing when mixture starts to "bubble" around edges of pan.) Remove from heat. Stir in marshmallows, chocolate, vanilla and nuts. Stir vigorously for 1 minute (until marshmallows melt and blend). Pour into 8 inch square buttered pan. Cool. Cut in squares.