Colombians put 4 limes into the blender whole, peel included, and that is where the risk lives: the green zest releases aromatic oils almost immediately, while the white pith underneath starts releasing bitterness somewhere past the twentieth second. The whole recipe fits in that 12-second window. Four glasses at 95 calories, five minutes.
How do you make Colombian lemonade with condensed milk? Scrub 4 limes, trim the ends, quarter and seed them. Blend 12 seconds with 4 tbsp of condensed milk, 2 cups of cold water, 7 oz of ice and a pinch of salt, strain without pressing and serve at once. 4 glasses, 5 minutes.
The twelve seconds
A lime’s peel has two layers that behave in opposite ways. The outer one, green and glossy, is packed with glands full of aromatic oils that release the moment a blade breaks them. The inner one, white and spongy, is the pith, and what it releases is bitterness.
At 5 seconds the drink tastes like ordinary limeade, because the oils have barely started coming out. At 12 they are in the glass and the pith has given up nothing. Somewhere past the twentieth second it reverses, and by forty the drink is bitter beyond saving.
Count out loud rather than guessing. And trim both ends of each lime before blending: those are the points where the pith is thickest.
Which limes
Persian limes — the large green ones in every supermarket — are the practical choice because they are seedless, and seeds are the other source of bitterness. Key limes are more aromatic and work beautifully, but seed them quarter by quarter first.
A lemon works too, with a caveat: its pith is thicker, so blend for 10 seconds rather than 12. Bottled juice does not work at all, since the peel is half of what the recipe is after.
Why it is drunk immediately
Condensed milk is concentrated milk, and its protein, casein, clumps and precipitates once the surroundings turn acidic enough. Lime juice is among the strongest acids in a kitchen, so the mixture eventually curdles.
What delays it is the cold. At the temperature of freshly blended ice that aggregation is far slower, which is why the drink holds up perfectly for as long as it takes to pour and finish it. Half an hour later, lumps appear.
So there is no point making it in advance. If you want to get ahead, have the limes scrubbed and cut and the water properly cold; the rest is 12 seconds.
Four lemonades on one base
The plain one is juice and sugar and keeps 2 hours in the fridge. This one and the coconut version carry dairy and are drunk at once. The cherry one swaps the sweetener for syrup.
On calories, the coconut version doubles this one, since it adds coconut milk on top of the condensed milk. The plain one, sweetened with a couple of teaspoons of sugar, is the lightest of the four.
Where the five minutes go
Everything but the blending is preparation, and the blending is a fraction of the total.
Make it ahead
You cannot make the drink ahead, but you can make everything else ahead: scrub, trim and quarter the limes and keep them covered in the fridge for up to a day, and chill the water overnight. Then it is genuinely 12 seconds between thinking of it and drinking it.
What goes wrong
Blending past 20 seconds. The pith releases bitterness and there is no way back.
Leaving the seeds in. They are as bitter as the pith.
Pressing the pulp when straining. It pushes through the bitterness you avoided.
Making it in advance. The acid curdles the milk and lumps appear.
Room-temperature water. Without the cold, it curdles much sooner.
Variations
Coconut. Two tablespoons of coconut milk alongside the condensed milk, at 185 calories a glass.
Cherry. One tablespoon of cherry syrup per glass, no dairy.
With mint. Four leaves blended with the limes, which lifts the aroma.
Dairy-free. Lime, water, ice and 2 teaspoons of sugar a glass.
What to serve it with
This is a hot-country lunch drink and it works best against fat: with a fritanga platter, with Colombian patacones, or beside Colombian chorizo. A glass is about 8 oz.
At a Colombian table it goes well with Colombian chicken rice or with viudo de pescado, where lime is already part of the recipe. When the fruit is in season, soursop juice fills the same glass with something creamier.
Frequently asked questions
Why is mine bitter? You blended too long, left the seeds in, or pressed the pulp while straining.
How many seconds exactly? Twelve. Fewer than eight gets no aroma from the peel; more than twenty gets bitterness from the pith.
Can I make it ahead? No. Lime acid curdles condensed milk — make it and drink it.
Which limes are best? Persian limes, because they are seedless; 4 medium ones make a jug. Key limes work if you seed them.
Can I skip straining? You can, but bits of peel keep releasing bitterness in the glass.
Nutrition
Per 8-oz glass, a quarter of the jug, calculated from each ingredient according to the USDA SR Legacy database:
- Calories: 95 kcal
- Protein: 3 g
- Carbohydrates: 18 g, 15 g of it sugar
- Fat: 2 g, 1 g of it saturated
- Fibre: 1 g
- Sodium: 35 mg
Nearly all of it comes from the 4 tablespoons of condensed milk, which the USDA puts at 321 kcal per 100 g. Drop to 3 tablespoons and a glass lands near 75 calories while staying creamy; with no condensed milk at all and a couple of teaspoons of sugar, it is around 60.
We did not have this at home in Venezuela: limes went with sugar and that was that. I met it in Colombia at an ordinary weekday lunch, and what surprised me was not the condensed milk but that they blended the whole lime and it did not turn bitter. Josnaisis.