How to make kefir without grains?

Authentic kefir only exists with live grains. Powdered starters give a one-shot drink; live grains give a culture you reuse forever.

How long does kefir take to ferment?

24 hours for a mild drink at 21-25 C, up to 48 hours for more fizz and tang. Milk kefir is usually ready in 24 hours.

Can I pause my kefir grains?

Yes: water kefir grains keep 2 weeks in sugar water in the fridge, milk kefir grains 10 days in fresh milk.

How to Make Kefir at Home: The Complete Guide 2026

How to make kefir at home: the complete guide

Everything you need to learn how to make kefir: water kefir and milk kefir, step by step, with real quantities, timings, a batch calculator and answers to the mistakes every beginner makes.

What is kefir Water or milk Step by step Calculator Times First week Cost FAQ

How to make kefir, in one sentence: place live kefir grains in milk or sugar water, leave them at room temperature for 24 to 48 hours, strain, and enjoy a naturally fizzy fermented drink. The grains are reused endlessly, batch after batch.

Learning how to make kefir takes about ten minutes of reading and one real attempt. This guide covers both families of kefir, the exact process, and the small details (water quality, temperature, storage) that make the difference between an average batch and a brilliant one.

Water kefir or milk kefir: which one to make?

Before learning how to make kefir, choose your family. The two share the same logic (live grains + sugary liquid + time) but not the same taste, texture or rhythm.

💧 Water kefir

A sparkling, fruity soda alternative. Grains + sugar water + lemon and dried fruit. Ready in 24 to 48 hours, light and refreshing. Perfect if you want how to make kefir to feel like making homemade lemonade.

🥛 Milk kefir

A creamy, tangy drink close to drinkable yogurt. Grains + whole milk, nothing else. Ready in about 24 hours. The choice if you love dairy and want a daily ritual with almost zero effort.

How to make kefir: live water kefir grains

How to make kefir step by step

The method below works for both families; the liquid changes, the gestures stay the same.

Wake up your grains. Live grains arrive ready to work. Give them a gentle rinse with non-chlorinated water (water kefir) or start directly in milk (milk kefir).
Prepare the liquid. Water kefir: 1 litre of spring water + 40 g of sugar + half a lemon + 2 dried figs. Milk kefir: 1 litre of whole milk, ideally unhomogenised.
Add the grains. About 20 to 30 g of grains per litre. Use a glass jar, cover with a cloth or a loose lid; the culture needs to breathe.
Ferment at room temperature. 20 to 25 °C is the sweet spot. 24 hours for a mild drink, 48 hours for more fizz and tang.
Strain and bottle. Pour through a plastic or stainless sieve. The liquid goes to the fridge (or a second fermentation with fruit); the grains start the next batch immediately.
Repeat forever. That is the beauty of knowing how to make kefir: the grains grow and multiply, so your first culture is also your last purchase.

🧮 Batch calculator

How many litres do you want to ferment?

For 1 litre(s): 25 g of grains, 40 g of sugar (water kefir) or 1 L of whole milk.

Fermentation times and temperatures

Temperature	Water kefir	Milk kefir	Result
18 to 20 °C	48 h	36 h	Mild, lightly fizzy
21 to 25 °C	24 to 36 h	24 h	Balanced, the classic
26 to 28 °C	18 to 24 h	18 h	Fast, tangier, watch closely

Flavour ideas for the second fermentation

🍋 Lemon + ginger🍓 Strawberry + mint🍑 Peach🍇 Grape🌺 Hibiscus🍍 Pineapple

How to make kefir: live milk kefir grains

Your first week, day by day

Day	What to do
Day 1	Grains arrive: gentle rinse, first batch in 0.5 L to reactivate them.
Day 2	Strain the activation batch (drinkable but simple). Launch a full 1 L batch.
Day 3-4	First real batch: taste at 24 h, decide if you prefer 36 or 48 h.
Day 5	Try a second fermentation: bottle with fruit, 24 h at room temperature.
Day 6-7	Your rhythm is set. Grains have visibly grown; share or store the surplus.

Homemade vs store-bought: the honest math

	Homemade kefir	Store-bought
Price per litre	0.15 to 0.60 €	3 to 6 €
Culture	Live, reusable forever	None (pasteurised)
Flavours	Unlimited	3 or 4 recipes
Yearly cost (1 L/day)	about 100 €	1 400 € and more

Once you know how to make kefir, one litre costs less than a coffee. The grains from our kefir and kombucha shop arrive alive with this exact guide in the box.

How to make kefir: frequently asked questions

How to make kefir without any grains?

You cannot, and that is the point: authentic kefir only exists with live grains. Powdered starters give a one-shot drink; grains give a culture for life. Ours ship in 24/48h across Europe.

My kefir is too sour. What went wrong?

Too long or too warm. Shorten the fermentation by 12 hours or move the jar somewhere cooler. Sour kefir is never dangerous, just more intense; use it in dressings or smoothies.

Can I pause when I go on holiday?

Yes. Water kefir grains sleep in sugar water in the fridge up to 2 weeks; milk kefir grains in fresh milk up to 10 days. Longer breaks: rinse and freeze, or dry the grains.

How to make kefir fizzy like a soda?

Second fermentation: bottle the strained kefir in a swing-top bottle with a little fruit or sugar, 24 h at room temperature, then fridge. Open carefully; the pressure is real.

What water should I use for water kefir?

Spring water or filtered tap water. Chlorine is the enemy of the grains; if you only have tap water, let it sit uncovered for a few hours first.

Ready to make your first batch?

Choose your culture: live water kefir grains, live milk kefir grains or the complete kit. Shipped in 24/48h with this guide included. Curious minds can also read the history of kefir on Wikipedia.