Rum

K.O. Cooler

Name: K.O. Cooler
Yield: 1 servings

Glass: Double Old-Fashioned

Mariano Licudine's Mai-Kai adaptation of Donn Beach's Q.B. Cooler, three rums, grapefruit, honey, falernum, and a whisper of Pernod.

rum tiki mid-century blended jamaican demerara falernum

Ingredients

fresh orange juice (0.75 oz)
fresh lime juice (0.75 oz)
fresh white grapefruit juice (0.75 oz)
rich honey mix (0.5 oz)
falernum (0.25 oz)
Angostura bitters (1 dash)
Pernod (2 drops)
gold Puerto Rican rum (1 oz)
aged Demerara rum (1 oz)
151-proof Demerara rum (0.5 oz)
crushed ice (0.5 cup)
mint sprigs (1)

When Mariano Licudine left Don the Beachcomber's Chicago bar in 1956 to open the Mai-Kai with the Thornton brothers, he carried Donn's recipes forward and renamed many of them, Donn's Q.B. Cooler became the K.O. Cooler.¹ The Mai-Kai version blends elements from both 1937 and 1941 Q.B. iterations and adds white grapefruit juice plus a pair of Demerara rums for greater depth and potency.² Berry's Sippin' Safari documents the original Q.B. Cooler as a structural Mai Tai precursor; the K.O. Cooler is its tropical-and-spiced Florida cousin.³

Brand recommendations. Best: Cruzan Estate Diamond or Don Q Añejo for the gold Virgin Islands / Puerto Rican rum, El Dorado 12 for the aged Demerara, Hamilton 151 Demerara for the overproof, John D. Taylor's Velvet Falernum, Pernod Absinthe. Economical: Bacardi 8 or Cruzan Aged Light, Lemon Hart Original 1804 for the Demerara, Lemon Hart 151, BG Reynolds falernum, Herbsaint for the anise drops.

Instructions

In a blender combine fresh orange juice, fresh lime juice, fresh white grapefruit juice, rich honey mix (2:1 honey to water), falernum, Angostura bitters, Pernod, gold Puerto Rican rum, aged Demerara rum, and 151-proof Demerara rum.
Add crushed ice and flash blend at high speed for .
Pour unstrained into a double old-fashioned glass and top with additional crushed ice.
Garnish with several mint sprigs.

Sources

"Mai-Kai Restaurant." Wikipedia. https://en.wikipedia.org/wiki/Mai-Kai_Restaurant (accessed 2026-05-03), documents Licudine's 1956 move from Don the Beachcomber's Chicago bar to Mai-Kai and his role designing the (largely unchanged-since-1956) Mai-Kai cocktail menu. ↩
Hurricane Hayward, "Mai-Kai cocktail review: What could be cooler than a Mai Tai history lesson?" The Atomic Grog. https://www.slammie.com/atomicgrog/blog/2011/07/19/mai-kai-cocktail-review-what-could-be-cooler-than-a-mai-tai-history-lesson/ (accessed 2026-05-03), tribute reconstruction; documents the K.O. Cooler as Licudine's hybrid of the 1937 and 1941 Q.B. Cooler iterations and the source for this file's measurement bill. ↩
Berry, Sippin' Safari (2017 ed.), Q.B. Cooler entry, recovers Donn Beach's 1937 and 1941 Q.B. Cooler specs and frames them as structural Mai Tai precursors. ↩