Creamy Irish Cream Liqueur just like your favorite from the store. Use it in all of your favorite Irish Coffee and cocktail recipes measure for measure. And say, "Yum"
Mix all of the ingredients except the vanilla bean in a blender using on/off pulses until well blended.
Pour into a sterile quart jar.
Split the vanilla bean and drop into the jar.
Cover tightly and refrigerate overnight.
Next day remove the vanilla bean and put in a decorative bottle (that seals).
Keep refrigerated for up to two months.
Shake well before using.
Notes
Non-alcoholic variation: For a non-alcoholic version use 2 cups strongly brewed Earl Grey tea for the whiskey and 1 teaspoon instant coffee. I know, it sounds weird but it works. This will not keep a long time, however, because of the lack of alcohol. Plan on drinking it within a week.