2/3 c. (small can) undiluted carnation evaporated milk
1-2/3 c. sugar
1/2 tsp. salt
1-1/2 c. (about 16) diced marshmallows
1-1/2 c. (1 1/2 six oz. packages) semi-sweet chocolate pieces
1 tsp. vanilla extract

Combine milk, sugar and salt in sauce pan over medium heat. Bring to boil and cook for 4 to 5 minutes, stirring constantly. Start timing when it bubbles around edges of pan. Remove from heat, add marshmallows, chocolate and vanilla extract. Stir vigorously for 1 minute or until marshmallows are completely melted and blended. Pour into 8 inch square buttered pan. Garnish with nuts if desired. Cool, cut into squares.