Entwistle's Error

Difford’s Guide
Discerning Drinkers (60 ratings)

Serve in a Collins glass

Ingredients:
2 oz Caribbean blended rum aged 6-10 years
12 oz Lemon juice (freshly squeezed)
13 oz Monin Pure Cane Syrup (65.0°brix, equivalent to 2:1 rich syrup)
2 12 oz Thomas Henry Tonic Water
× 1 1 serving
Read about cocktail measures and measuring

Garnish: Lemon slice wheel

How to make:

SHAKE first 3 ingredients with ice and strain into ice-filled glass. TOP with tonic water.

Strength & taste guide:

No alcohol
Medium
Boozy
Strength 6/10
Sweet
Medium
Dry/sour
Sweet to sour 6/10

Review:

Long and refreshing with rum character, lemon freshness and tonic water's slightly bitter bite.

View readers' comments

Nutrition:

One serving of Entwistle's Error contains 234 calories

Alcohol content:

  • 1.3 standard drinks
  • 11.03% alc./vol. (11.03° proof)
  • 17.6 grams of pure alcohol

Difford’s Guide remains free-to-use thanks to the support of the brands in green above. Values stated for alcohol and calorie content, and number of drinks an ingredient makes should be considered approximate.

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Avery Garnett’s Avatar Avery Garnett
17th August 2024 at 17:38
Do you want an aged rum & tonic? Then look no further. It tastes exactly like you'd expect ED8 and tonic to taste. Unfortunately it's not particularly special. It lacks a bite as the caramel notes of the rum and the quinine bitterness pull in different directions.
30th March 2022 at 21:28
Wife and I like it. Appleton Signature. Stock tonic water. C'mon summer.
John Hinojos’ Avatar John Hinojos
27th September 2021 at 01:42
Very good. We decided to amp up the rum and used some pot-stilled black Jamaican and overproof Navy Rum. It was great.
Curious, was this named after the actress Peg Entwistle from the 1930s who was also known as the Hollywood Sign Girl. Does anyone know the genesis of the name for this coctail?
20th November 2021 at 08:49
I made this tonight, and I'm curious where the "error" came into it - delicious!
J W-S’ Avatar J W-S
28th December 2020 at 19:58
This is lovely, used Schweppes I'm afraid but delicious none the less. Very quaffable!
Sandip Gohil’s Avatar Sandip Gohil
17th September 2020 at 21:46
I ended up making this with Havana Club 7 and Fever Tree Mediterranean tonic and it came out very, very nice.

As ever, this site is great because if you have leftover lemon juice, you can just use the advanced search and see what else you can make with fresh ingredients.

Great way to discover new drinks
Simon Difford’s Avatar Simon Difford
18th September 2020 at 07:12
Many thanks for your kind words. The site is an ongoing work-in-progress / labour-of-love.
G. M. Genovese’s Avatar G. M. Genovese
14th September 2020 at 01:37
Fever Tree 'Refreshingly Light' Premium Indian Tonic Water did not cut it in this recipe. Had to add approx 1/2 tsp 2:1 sugar syrup. Lovely with the El Dorado 8, though. Always looking for ways to use it.
Simon Difford’s Avatar Simon Difford
16th September 2020 at 21:01
Agreed. Although I found it needed 7.5ml top 10ml sugar syrup and I worry that I left this out when I originally uploaded this cocktail. Many thanks for bringing to my attention.