Food Lust People Love: Umeboshi Calamansi Lime Juice

Wednesday, October 8, 2025

Umeboshi Calamansi Lime Juice

Umeboshi calamansi lime juice is a refreshing drink popular in Asia, made with calamansi limes and sour plums aka umeboshi over ice.

Back in February of this year, I went to my Costco and discovered several pallets of citrus trees right outside the front door. To my absolute amazement, one of them was a calamansi lime! The tag had a different name and the peels were orange instead of green, but I’d know that aroma anywhere after living in Malaysia, Singapore and Indonesia for a combined total of 13 or 14 years.

There were only a few left so I did not hesitate and put one in my shopping cart right away. Then a funny thing happened. I was stopped repeatedly by other customers as I did the rest of my shopping, wanting to know where I’d found the tree! Apparently, there were none left up front. One Asian woman even questioned why I needed it. I guess she was hoping I’d hand it over? Who knows!

Anyhoo, I planted the baby in the ground in my backyard and it rewarded me with a decent crop of little limes, as seen below. Crossing my fingers it will do the same again in the next few months.

Depending on the country, this delicious drink is called different names. In Malaysia where I ordered it often, it’s known as limau kasturi asam boi or usually just limau asam boi, but it’s always made with calamansi or kasturi limes.

And for those who are curious, normal green limes are called limau nipis in Malay. Just limau means lemon.

Umeboshi Calamansi Lime Juice

If you aren’t fortunate enough to be able to source the calamansi limes you can make this with regular ones (skip blending the peels!) but you’ll need more sugar to counterbalance the tartness of the juice.

Ingredients to serve two:

2 teaspoons sugar

6 calamansi limes

2 umeboshi or dried sour plums

Ice cubes

Method

Add 1 teaspoon sugar and one sour plum into each glass. Pour in 1/4 cup or 60ml hot water in each to dissolve the sugar and steep the sour plums.

Wash the limes and cut them in half.

Remove the seeds and squeeze the juice into a large measuring cup or bowl.

Use a metal straw or spoon to mash the plums in the glasses a little.

In a blender or food processor, blend the lime peels with 2 tablespoons of the squeezed juice.

Strain through a sieve into your measuring cup or bowl, pressing gently with a spoon to get all the juice out. Discard the peels.

Divide the juice between the glasses and add ice cubes.

Enjoy!

Welcome to the 21th edition of Alphabet Challenge 2025, brought to you by the letter U. Many thanks to Wendy from A Day in the Life on the Farm for organizing and creating the challenge. Check out all the U recipes below: