With a bottle of whiskey and some basic ingredients you probably already have in your cabinet, you can make the most amazingly tasty Irish cream you've ever had.
Combine all ingredients in a blender and set on low speed for 30 seconds. If you blend at too high a speed, you might wind up with coagulation or foaming.
Bottle in a tightly sealed container and refrigerate. Shake before using.
Will keep for up to 2 months.
Video
Notes
Total time includes time to cool in the refrigerator.