- Mix together cornstarch, butter and sugar in heavy based skillet. Add milk and cocoa then mix well.
- Cook until a little of the mixture dropped from a spoon forms a ball in a cup of cold water.
- Remove from heat, add peanut butter and vanilla extract.
- Mix all the ingredients thoroughly and pour in a fudge molder, let it cool until firm.
- Refrigerate until chilled, then serve.