Step 2: Build
Cover the bottom of the cup with Creme de Cocoa. Sorry I can't give you a specific measurement here it depends on the size of the cup.
Add a jigger of Irish Whiskey. The Mom only uses about 3/4 of a jigger.
Fill the cup to within about 3/4 of an inch to the top. We're leaving room for the whipped cream.
Using a spiral pattern fill the cup with the whipped cream. Please don't use the cheaper non dairy type, it really wrecks it. You find it in an aerosol can in the dairy section at any supermarket. We like to use the Safeway brand.
Drizzle some more Creme de Cocoa on the whipped cream.