Homemade a2 Milk® Yoghurt for Kachumber

Two litres of A2 full-cream milk warmed to forty degrees, milk powder whisked in for body, then cultured overnight with a couple of knife-tips of live yoghurt culture. Sets into thick, custardy yoghurt at home. The base for raita, lassi, breakfast bowls. A pantry project that pays back over weeks.

Making yoghurt at home is a French country cooking instinct from a household before refrigerators, when milk had to be preserved by fermenting it into something more stable. The biology is straightforward: warm milk, a starter culture of lactobacillus bacteria, the right temperature held for the right number of hours, and the bacteria do the rest.

The forty-degree number matters. Below thirty-five and the bacteria are sluggish; above forty-five and they die. A digital thermometer takes the guesswork out. A yogurt maker (or a thermos, or an oven with just the light on) holds the temperature overnight; the milk slowly thickens as the bacteria multiply and acidify the proteins.

A2 milk (the variant with only the A2 beta-casein protein, no A1) is easier to digest for people who get upset by regular dairy. The added milk powder thickens the body without needing a separate strain or a longer ferment. Keeps for two weeks in the fridge; the last spoon of each batch becomes the starter for the next.