Donn's Mix - Grapefruit & Cinnamon Tiki Mixer

Donn's Mix is a two-ingredient tiki mixer that combines fresh grapefruit juice with cinnamon syrup. The Donn's Mix recipe is deliberately simple, but its bittersweet citrus and warm spice add depth to layered tropical cocktails without dominating the base spirits.

A Donn Beach Tiki Staple

Donn's Mix is associated with Donn Beach and the early tiki cocktail tradition. It became known as one of the proprietary-style supporting mixtures used to build complex tropical drinks, most famously the Zombie. The standard modern formula uses two parts grapefruit juice to one part cinnamon syrup.

What You'll Need

Ingredients

• Grapefruit Juice - provides fresh citrus acidity, bitterness, and fruit character.
• Cinnamon Syrup - adds sweetness and warm spice that softens the grapefruit's sharper edges.

Fresh grapefruit juice gives the brightest result, while bottled juice can work when consistency and convenience matter more. The cinnamon syrup should be flavorful but not so concentrated that it overwhelms the citrus.

Equipment

• Jigger
• Spoon
• Mason Jar

Why the 2:1 Ratio Works

Using twice as much grapefruit juice as cinnamon syrup keeps the mixer citrus-forward while giving it enough sweetness and spice to hold up in strong tiki cocktails. The syrup should support the grapefruit rather than turn the mixture into a sweet cinnamon concentrate.

Substitutions & Variations

• Use fresh yellow grapefruit juice for the closest match to the classic tiki profile.
• Pink or ruby red grapefruit creates a fruitier, slightly softer variation.
• Adjust the cinnamon syrup strength rather than changing the 2:1 ratio if the finished mix tastes too sweet or too spicy.
• Do not replace the cinnamon syrup with plain simple syrup when the recipe specifically calls for Donn's Mix, because the cinnamon is part of its defining flavor.

Helpful Tips

• Combine the ingredients cold so the mix is ready to use immediately.
• Stir thoroughly until the syrup is fully incorporated.
• Refrigerate the finished mixture in a clean sealed container.
• Shake or stir briefly before using if it has been sitting.
• Scale the recipe in the same 2:1 ratio for larger batches.