Because you asked, here's the recipe for the fudge I made my youngins for Valentines.
2 cups sugar
2 Tblsp. cocoa
3/4 cups milk
2 Tblsp. karo syrup
2 Tblsp. butter
2 Tblsp. peanut butter
1/2 teaspoon vanilla extract
In a heavy 2 qt sauce pan mix sugar and cocoa until thouroughly blended. Stir in milk and corn syrup. Heat over medium until all disolved and starts to boil. Cook to the soft ball stage. (drop a little in cold water and see if you can roll into a soft ball). Remove from heat and add butter and peanut butter without stirring. Let cool a few minutes. Then stir in vanilla and beat until it thickens and begins to lose it's gloss. Pour into a buttered plate. Let cool.
You can stir in 1/2 cup broken pecans or walnuts at the end of the beating time if you like. You can make peanut butter fudge by omiting the cocoa and adding another Tablespoon of peanut butter.
I have a real old recipe of mother's that doesn't call for the peanut butter. But it requires a lot longer beating time. My hands and wrists can't hold up to it. The peanut butter is actually a trick to decrease the beating time. Can't even taste it in the regular chocolate fudge.