Step 1

Fill a highball glass with ice.

Step 2

Gently pour the ginger beer into the glass. Add soda to about two fingers below the rim of the glass.

Step 3

Add the whisky and bitters and stir using a bar spoon.

Step 4

Taste an add more soda if necessary.

Step 5

Garnish with a slice of blood orange (if using). Serve immediately.