Use cranberry butters instead of orange and Angostura.
Use Wild Turkey 101 bourbon or rye. TURKEY PUN!
Batched Old Fashioned
You can batch any of these variations if you're taking it to a party and don't want to make drinks all evening. Below will make a batch of about 16 cocktails.
Add the following to a pitcher or empty liquor bottle or whatever you want...
2 cups bourbon or rye
0.5 cup simple syrup
32 dashes of bitters
0.5 cup water
Shake gently a little to mix.
Pour over ice to enjoy.
Notes
If you want it sweeter, use up to 0.5 oz simple syrup.
You could use all Angostura bitters if you don't have orange bitters.
Use up to 2.5 oz bourbon if you're trying to go hard.
Don't have simple syrup and don't want to make it (even though it's super easy)? Use maple syrup instead. Or use 1 tsp of any type of sugar you have. Just be sure the sugar dissolves. You may need to stir it in a little bit of water before adding the bourbon.