Grandma Johnson's Fudge

2 cups sugar
3/4 cup milk, canned
2 TBSP corn syrup
1/4 cup cocoa
1/4 cup water, cold
1/2 tsp salt
1 TBSP butter
12 marshmallows
1 tsp vanilla extract
1 cup walnuts, finely chopped
1 drop peppermint extract

Cook together slowly all except butter, marshmallows, vanilla, nuts, and peppermint.
Wash sides of kettle. Stir constantly and cook to 232 degrees with candy thermometer, or to soft ball stage. Put on platter or marble and cool to 140 degrees. Beat slowly until it begins to set. Add marshmallows, cut in pieces, nuts, vanilla, and peppermint.