Skeleton Key

Ingredients 

1 1/4 ounces bourbon

3/4 ounce elderflower liqueur

1/2 ounce fresh lemon juice

3 to 5 ounces ginger beer

8 dashes bitters


Directions 

Build the bourbon, liqueur, and lemon juice in a collins glass filled with ice.

Top it off with ginger beer.

Garnish with bitters.

Serve with a straw.