This drink appears in both Jeff Berry's Intoxica! and in Martin and Rebecca Cate's Smuggler's Cove and I've borrowed variations on both recipes to make this drink. Here's Berry's recipe, to which he credits Donn the Beachcomber, circa 1941 (my modifications noted):
2.50 oz. fresh lime juice
1 tsp fresh lemon juice
1.50 oz. passion fruit syrup1
0.25 oz. sugar syrup2
1.00 oz. Demerara rum3
0.25 oz. Demerara rum4
0.50 oz. maraschino liqueur
Method: shake everything - except the 151 rum - with ice cubes. Strain into a double old fashioned glass filled with crushed ice. Carefully float the 151 rum. Do not stir.
1 Given my experience with the Monin passion fruit syrup of it being way too overpowering if used in recommended quantities, I decided to halve the amount for this drink to 0.75 oz. If you have made your own passion fruit syrup or perhaps use a different, less powerful brand, your mileage may vary. For the Monin, 0.75 oz. was just about right.
2 I used Demerara sugar syrup instead
3 I upped this slightly to 1.25 ounces
4 I went with Martin Cate's version and used 0.75 oz. of the Lemon Hart 151
I also went with Cate's version of serving this drink - with a "side of danger!" - and poured the 151 rum into a separate shot glass. Cate recommends "encourag[ing] guests to pour as much or as little of the overproof rum into their drink as they like, and experience how the drink flavor changes."
|A side of danger! Lemon Hart 151|
|Floating the 151 rum|
|Post 151 float|
Jeff Berry ends the recipe page for the Demerara Dry Float with the "Beachcomber's Creed" composed in the early 1940s by Donn's first wife, Cora "Sunny" Sund:
"Our number one pre-requisite / Never stand when you can sit / And if you can - lie down a bit / Relax - no matter what you do / Enjoying life is up to you / The world is just a point of view / When day is done - and comes the night / No pastime makes the stars so bright / As greeting dusk with rum's delight / of all life's pleasures, deeplly drink / At every worry give a wink / It's much later than you think"
Cheers to that.
A slightly different take on the same sentiment, about 40 years later: