*What can I substitute for bourbon?
There's an entire family of alcohol that's closely related (unless you're an aficionado of one in particular and then all bets are off). Bourbon can only be called bourbon if it's been made in the USA and is at least 51% corn mash. In Canada, the very same thing is called whiskey (also called rye or rye whiskey but it's still mostly corn). Scotch is in the same family, except that it's mostly barley and the casks are older. So...you can sub in whiskey, whisky, Scotch, or even a light rum and get a great result. Use what you like to drink and you can't go wrong.