Yogurt soju is the rare viral drink that was ordinary somewhere else first. In Korea it is a convenience-store move: a green bottle of soju, a small yogurt drink from the same fridge, and often a lemon-lime soda to make the glass longer. The yogurt is tangy and sweet. The soju is clean and stronger than beer, softer than whiskey. The soda keeps the cream from sitting heavy.
English recipes disagree on the ratio, and Korean home recipes disagree too. The glass below is equal parts, two ounces each, because that split is easy to remember and strong enough that the soju is still there. It is a home measurement, not a claim about what every convenience-store cup contains.
Where yogurt soju came from
Soju is Korea’s everyday distilled spirit, bottled mild enough that people mix it more often than they sip it neat. The fresh style in the green bottle, the one most often exported, usually lands between 16% and 20% ABV. Next to it in a CU or GS25 fridge are tiny yogurt drinks, some thin and cultured like Yakult, some a little thicker. Putting one into the other is the kind of recipe that does not need a bartender. You need a bottle opener and a preference for sweet things.
Soda showed up because two creamy ingredients can sit heavy, and because lemon-lime soda is already a common soju highball. Korean lemon-lime soda, often called cider on the can, works the same way as any cold lemon-lime soda from a US grocery store.
A sloppier serve is the bottle method: drink some of the yogurt, refill the little bottle with soju, and shake it with a thumb on the mouth. Bottle sizes move between about 2.2 oz and 2.7 oz, so that version is not measurable. This recipe uses a jigger so the second glass matches the first.
Banana milk and soju is a real Korean cousin, and it tastes like banana candy. It will not give you the tangy yogurt glass. No bar price can be quoted fairly. Build it from a shop.
Why typical copycats miss
The sweet crash is the common one. Flavored soju, the peach and grape and yogurt-flavor bottles, plus a sweet yogurt drink, plus soda, is sugar on sugar on sugar. Plain soju is what leaves the yogurt’s tang in charge. If the only soju you can find is flavored, cut it with an extra ounce of soda and taste before you add the full two ounces of yogurt.
Thick yogurt is the second miss. A spoonable cup of breakfast yogurt does not pour, and it turns the highball into a melted parfait. You want a drinkable yogurt, the kind that comes in a little bottle you can shake. If it still coats the spoon, thin this recipe with another ounce of soda.
Warm bottles ruin the texture. Soju that was not chilled, yogurt that was not chilled, and a handful of wet ice produce a gray, watery glass. There is no citrus juice here to distract you. Put all three bottles in the fridge.
Skipping the stir before the soda leaves ribbons of yogurt on the ice. Stir the soju and yogurt together until the color is even. Then add the soda and stop. A second, vigorous stir is how you get a flat cream soda.
The key technique: loosen the yogurt, then protect the soda
Ice first, all the way up a highball. Yogurt and soju second, two ounces each. Stir until the glass is one color. The yogurt should look poured, not dolloped. If your yogurt drink is one of the sweeter, thicker Korean bottles, this is the moment to decide whether two ounces is too much. You can stop at 1 1/2 oz (45 ml) and add a little more soda later.
The soda goes in last, two ounces, down the side. You are looking for a lift of foam and a lighter body, not a drink that is mostly soda. One gentle turn of the spoon. A lemon wedge is optional and mostly aroma. The soda already brought the citrus.
Taste before you make a second one. A softer 16% bottle drinks creamier. A 20% bottle is a stronger drink in the same-looking glass. The 0.6 standard-drink figure assumes 17% soju. For a long November watch party, this is an easy cooler when nobody wants another brown spirit. It is sweet and creamy, and it is not a cranberry holiday drink.
A pitcher from one soju bottle
A common soju bottle is about 360 ml, close to 12 oz. That is six of these drinks if every drink gets two ounces of soju.
Pour the bottle into a pitcher. Add 12 oz (360 ml) drinkable yogurt. Stir until smooth and refrigerate until the party, up to a few hours. Do not add 12 oz (360 ml) lemon-lime soda until you are ready to pour. Soda in the pitcher at noon is quiet soda at dinner. If you would rather keep the fizz perfect, leave the soda out of the pitcher entirely and top each ice-filled glass with 2 ounces as you pour a 4 ounce mix of soju and yogurt.
Six highballs, each about 0.6 standard drinks with a 17% soju, means the pitcher is a full bottle of liquor. Keep the bottle where people can see the label. For eight drinks, open a second bottle and scale the yogurt and soda. Extra soda alone turns the recipe into yogurt soda.
The yogurt citrus fizz
Soju’s job in the flavor, aside from alcohol, is a clean, slightly grainy, unsweetened volume. Unsweetened barley tea is the closest dry stand-in that does not add another sweetener. Brew it strong, chill it hard, and use two ounces in place of the soju. The yogurt and the lemon-lime soda stay where they were. Stir the tea and yogurt first so the dairy does not clump, then add the soda once.
The mocktail tastes tangy, fizzy and a little toasty. It will not taste like soju. A 0.0% soju-style bottle can replace the tea if you prefer it and the label actually says 0.0%. Sugar still comes from the yogurt and the soda, about 15 grams here. Chill it and drink it the day you build it.
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