Also add in espresso (concentrated coffee), powdered sugar, cocoa, vanilla extract, and whiskey.
Close the blender jar with a lid and blend to a smooth consistency.
Enjoy on the rocks or mixed into drinks. You can pour your Irish cream into a clean bottle to enjoy another day.
Video
Notes
Espresso is concentrated coffee. You can use regular coffee too but it won't give the flavor that you need in this homemade liqueur and it will water it down. Instant coffee powder is an option too but you won't get those real coffee flavors.
Use Jamson or other Irish whiskey preferably, but you can use any other nice tasting whiskey too.
Use unsweetened dark cocoa or cacao powder.
The vanilla extract is kind of optional but I personaly wouldn't want to miss it.