Add the orange juice and whiskey. Taste and adjust according to preference.
4 ounces Orange Juice, 2 ounces Whiskey
Shake in the bitters and garnish as desired.
2 dashes Angostura Bitters
Notes
You can use any type of whiskey you like for this cocktail. The orange juice will mask some of the nuanced flavors though so you don't have to use your best sipping whiskey. As long as the proof of the whiskey is around 100, it's going to hold up really well in this drink.
Variations
Use blood orange juice for a darker, pink color.
If you want to add some sweetness, you can add a dash of simple syrup or maple syrup.
For a carbonated cocktail version with a little fizz, top your drink off with some soda water or ginger beer.
For an alcohol-free virgin whiskey and orange juice, swap out the whiskey for a zero-proof whiskey. This way you can still enjoy all of the flavors from the whiskey without any of the alcohol.