Indian Summer carries a name that’s exactly what it sounds like: a term from the northeastern United States for a stretch of clear autumn days, warm afternoons meeting cool nights, much like Japan’s own “koharubiyori.”
Rum’s mellow depth forms the base, egg yolk wraps it in a silky texture whipped into light foam, and a gentle top of soda finishes it with a soft fizz and pale golden hue.
Pour one tonight, a small, sunlit pocket of calm captured in a glass.
Recipe and How to Make It
Ingredients
Recipe no.048
- Rum — 1 1/2 oz (45ml)
- Lemon juice — 2/3 oz (20ml)
- Sugar syrup — 1 tsp
- Egg yolk — 1
- Soda water — Full
- “1 tsp” refers to one bar spoon’s worth.
- “Full” means filling the glass to about 80–90% capacity.
Because this recipe uses raw egg yolk, using pasteurized eggs is recommended if you’d like to avoid any risk of salmonella.
Instructions
Add the rum, lemon juice, sugar syrup, egg yolk, and ice to a shaker.
Shake thoroughly and strain into a glass filled with ice. Since egg yolk is involved, shake harder and longer than usual to fully emulsify everything.
Fill gently with soda water to avoid excess foam, then stir slowly and lightly. When mixing in something carbonated, one to two slow rotations while lifting and lowering the ice is all it takes to combine everything.
- Technique ｜ Shake & Stir
- Glass ｜ Collins glass / Tumbler
- ABV ｜ Roughly 9%
- Best Enjoyed ｜ Daytime / Before dinner
Indian Summer in Detail, with Video
Flavor & Character
The name comes from “Indian summer,” a term used in the northeastern United States for a stretch of clear autumn days — warm afternoons, cool nights — much like Japan’s own “koharubiyori.” That gentle, in-between seasonal feeling is exactly what this rum-based cocktail is built to capture.
Rum’s mellow depth forms the base, lemon juice sharpens its outline, and sugar syrup softens the edges. Egg yolk wraps everything in a silky texture, and a firm shake whips it into a light foam. Top it gently with soda and you get a soft fizz and a pale golden hue, the ice keeping everything crisp while the foam smooths out the mouthfeel like velvet.
The first sip opens with bright citrus, followed by rum’s lingering warmth, then a creamy softness that carries it all smoothly down the throat — the finish is genuinely refreshing. I’d recommend this as much for unwinding after work as for a quiet afternoon aperitif; either way, it delivers a small, sunlit pocket of calm in the middle of the season.
Points, Twists & Food Pairings
Points — A common mistake is under-shaking once egg yolk is involved, leaving the texture thin and separated instead of silky. Shake noticeably harder and longer than usual — a full 15-20 seconds — to properly emulsify the yolk into the mix.
Twists —
- Spiced Version — Add a dash of cinnamon or nutmeg on top for a warmer, autumn-leaning character that echoes the drink’s seasonal name.
- Dark Rum Swap — Use dark or aged rum instead of light rum for a deeper, more molasses-forward flavor.
- Citrus Twist — Add a thin orange peel garnish to layer in extra aromatic brightness alongside the lemon.
Best Pairings —
- Roasted almonds — their toasty, slightly bitter crunch echoes the rum’s depth while contrasting nicely with the drink’s creamy texture.
- Aged cheddar — its sharp, nutty richness balances the cocktail’s citrus tang, creating a genuinely satisfying contrast.
- Apple slices with honey — the natural sweetness and crispness mirror the drink’s autumnal theme, and I’d genuinely serve this pairing on any cool afternoon.
Recipe Video
- Recipe Video ｜ Bartender Hiroshi Arai Channel Home
