In a microwave-safe bowl, combine the chocolate chips, peanut butter, Baileys, vanilla, and salt. Heat in the microwave in 30-second increments, stirring after each increment, until the mixture is completely melted and smooth.
Stir in the chopped peanuts, if using.
Pour the mixture into the prepared baking pan and spread evenly.
Allow the fudge to cool completely before cutting into small squares.
Enjoy!
Interesting Facts
Baileys Irish Cream is a cream liqueur made with whiskey, cream, and cocoa.
This fudge can be stored in an airtight container in the refrigerator for up to 1 week.
You can substitute other flavors of liqueur for the Baileys, such as amaretto, Kahlua, or Frangelico.