Line a loaf pan with parchment paper and set aside.
Place the chocolate chips and sweetened condensed milk in a microwave-safe bowl.
Heat mixture, 30 seconds at a time, stirring between each interval. Heat for a total of 1 - 1 ½ minutes.
Stir until the chocolate is completely melted though the mixture is thick; then stir in the Irish cream and vanilla extract. Initially, the mixture will be thick and lumpy, but as the Bailey’s incorporates, it will make a smooth pourable mixture.
Spread fudge into the prepared loaf pan and chill in the refrigerator for 2 hours.
Lift from the pan by the parchment paper and cut into pieces.
Notes
This is a softer fudge; keep refrigerated until serving.The alcohol content in the fudge is not cooked off, so this is an adult treat! The Bailey’s flavor is really prominent in the fudge, but not overwhelming. It’s a smooth, Irish cream flavored treat.