Owner's reply

So glad you like the Peanut Butter Fudge Khadiravan! The trick I used to get this fudge to set is due to some mysterious tendency of peanut butter to start becoming increasingly sticky as it's mixed with sugar. I don't quite know the science behind why this happens. If you were to use brown sugar instead of powdered sugar it should still work; you'd just need to stir the mixture longer until it begins to bind more completely. Try mixing it for a minimum of a few minutes and see how it starts to stick together. It probably would also take longer with brown sugar because the sugar crystals would need to melt during stirring to become dispersed in the mixture to enable the fudge to start pulling together.



I think I decided to go with powdered sugar in this recipe because it eliminated the drama of mixing the fudge until the sugar crystals began to melt, making the recipe easier to prepare overall. Let me know if you get the brown sugar version to work. That's a fantastic idea!