1 1/2 oz of Bourbon
1 1/2 oz of madeira (or fortified wine)
3 dash of bitters
1 twist of orange peel
Combine over ice, stir, strain into coupe glass. Express orange peel into drink and use as garnish. I've riffed it using Rye or Bourbon, and I've used grapefruit peel instead of orange as well. All good.