Cracker Jack Marshmallow Cream Fudge

Found this in a vintage recipe book published Cracker Jack co...have not made it yet...also, not sure of quantity prepared still wonder about the cracker jack..name..no mention of it in the original old recipe...

• Ready In: 2 hrs 25 mins
• Yields: 36 pieces

Ingredients

• 4  tablespoons butter
• 4  ounces  unsweetened chocolate squares
• 4  cups sugar
• 1 1⁄2 cups milk
• 1⁄8 teaspoon salt
• 14  large marshmallows, cut in half
• 2  teaspoons vanilla extract

Directions

1. melt 4 tbls butter in a saucepan -- then add 4 squares of unsweetened chocolate and stir over a slow fire until the chocolate is melted --
2. Add 4 cups sugar, 1 1/2 cups milk and 1/8 tsp salt --
3. Stir until the sugar is dissolved -- then heat to the boiling point and cook without stirring until a little of the mixture forms a firm ball when dropped in cold water.
4. remove at once from the fire and set aside.without stirring until the mixture is lukewarm --
5. butter a large 13x9" bakling pan and cover the bottom with large marshmallows, cut into quarters --
6. when the fugde is nearly cold, add 2 tsps vanilla extract and beat until thick and creamy --
7. pour over the marshmallows, smoothing it with a spoon -- or knife --
8. then place the remaining quartered large marshmallows ove the top of fudge.pressing them in lightly --
9. refrigerate until well chilled and firm and cold --
10. cut into squares to serve.