Pour a shot (1 oz) of the butterscotch schnapps into the bottom of a tall shot glass. Using a spoon drizzle the Irish Cream on top of the schnapps for a layered drink. Even if they mix from fast pouring, this shot is sublime.
Technically they're called "chickadees"
The number of inappropriate ads to put here was astounding. Having resisted that temptation, these guys are super useful at parties.