Hot Rum and Brandy Flip

Name: Hot Rum and Brandy Flip
Prep time: 5 min
Total time: 5 min
Yield: 4 servings
Ingredients: 1 Eggs, separated; 1 Powdered Sugar; 1 Baking Soda; 3/4 oz Mr. Boston Rum; 1 Hot milk; 1 1/2 oz Mr. Boston Rum; 1/2 oz Mr. Boston Five Star Brandy

The Hot Rum and Brandy Flip is a traditional warm cocktail combining separated eggs, spirits, and hot milk into a creamy, frothy drink. Its standout trait is the silky texture created by whipped egg whites and the warming combination of rum and brandy.

🏷️Equipment: tom and jerry mug

Total

5 min

Servings

4

Difficulty

Medium

Est. Cost

$16–$26

Recipe Source

View original recipe

From Mr. Boston Drinks · by Mr. Boston Official Bartender's Guide 50th Anniversary Edition

Ingredients

1 Eggs, separated
1 Powdered Sugar

1 Baking Soda

3/4 oz Mr. Boston Rum

1 Hot milk

1 1/2 oz Mr. Boston Rum

1/2 oz Mr. Boston Five Star Brandy

7 Ingredients

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Instructions

1
First prepare batter, using yolk and white of one egg, beating each separately and thoroughly.
2
Then combine both, adding enough superfine powdered sugar to stiffen.
3
Add to this one pinch of baking soda and rum to preserve the batter.
4
Then add a little more sugar to stiffen.
5
To serve, use hot Tom-and-Jerry mug, using one tablespoon of above batter, dissolved in 3 tablespoons hot milk.
6
Then fill mug with hot milk within 1/4 inch of the top of the mug and stir.
7
Then top with brandy and sprinkle a little nutmeg on top.
8
The secret of a Tom-and-Jerry is to have stiff batter and a warm mug.

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Tips & Notes

Pro tips

Separate eggs carefully — even one yolk in the whites will prevent proper whipping and reduce foam quality.
Whisk the egg whites and sugar together until stiff peaks form before adding spirits; this creates the signature creamy texture.
Heat milk to steaming (not boiling) before adding to preserve the frothy top and prevent curdling.
Pour hot milk slowly into the whisked mixture while stirring gently to maintain the foam.

Substitutions

Mr. Boston Rum → any dark or spiced rum (note: flavor profile will shift)
Mr. Boston Five Star Brandy → cognac or another brandy (note: higher-quality spirits will elevate the drink)
Powdered Sugar → superfine sugar or regular sugar dissolved in a small amount of water (note: may require extra whisking)

Common Questions

Is it safe to drink raw eggs in this cocktail?

The recipe uses separated eggs whisked with sugar and baking soda, which aerates and partially cooks them through the whipping action and heat from hot milk. Use pasteurized eggs if concerned about food safety.

What does baking soda do in a flip drink?

Baking soda reacts with the acidic ingredients and creates additional carbonation and lift, resulting in a lighter, fluffier foam on top.

Can I make this ahead?

No — prepare flip drinks immediately before serving to preserve the frothy texture and proper temperature.

What's the difference between a flip and other egg cocktails?

A flip traditionally contains whole or separated eggs, sugar, and spirits shaken or whisked vigorously, then topped with hot liquid to create a creamy, warm drink.