2/3 cup cocoa
3 cups sugar
1/8 tsp. salt
1 1/2 cups milk
1/4 cup (1/2 stick) butter
1 tsp. vanilla

Thoroughly combine dry ingredients; stir in milk. Bring to a "bubbly" boil on medium heat, stirring constantly.

Boil WITHOUT stirring until mixture reaches 234°F (soft ball stage). Bulb shouldn't rest on bottom of pan.

Remove from heat, add butter and vanilla. DO NOT stir!

Cool at room temperature (110°F). Beat until fudge thickens and loses some of its gloss.