Cook in an oven 3 thick slices of pancetta for a good  30 minutes at 150 degrees to dry it. Then in a glass bowl pour your bottle of Jack Daniels and the pancetta, cover with foil and leave it to infuse for about 2-3 weeks in a fridge, depending on the pancetta, do it to your taste.
Once is ready filter it through a fabric like a tea towel back into the bottle.
Now let’s make the old fashioned cocktail:
In a small tumbler put 2 brown sugar cubes, dash of Angostura bitters and a dash of soda, brake the sugar and stir till dissolved, fill the glass with ice cubes, pour 50 ml of the infusion and stir for 10 seconds.
On the side serve in a egg shell with an egg yolk dressed as a Bloody Mary, with little pinch of celery salt, a little pinch pepper, one drop of lemon juice, 1 drop Worcester sauce and one drop of Tabasco.
Enjoy.
Smile.