Stretched-curd cheese: fresh mozzarella & burrata
Pasta filata — "spun paste" — is the family where curd is heated and stretched until it turns glossy and elastic. It is the first technique that feels like real cheesemaking, and mozzarella you make yourself is a different food from the supermarket kind.
How stretching works
As curd acidifies, it loses calcium and the protein matrix loosens. Hit the right window — roughly pH 5.1–5.3 — and hot water (~170–180°F / 77–82°C) lets the proteins slide and realign into fibers when you pull them. Too alkaline (under-acidified) and the curd tears instead of stretching; too acidic and it goes short and ricotta-like. This is why pasta filata is the cheese that most rewards a feel for pH.
Fast method — citric acid (about 1 hour)
| Ingredient | Amount |
|---|---|
| Whole milk | 1 gallon (3.8 L), not ultra-pasteurized |
| Citric acid | 1½ tsp, dissolved in ¼ cup cool non-chlorinated water |
| Liquid rennet | ¼ tsp, diluted in ¼ cup cool non-chlorinated water |
| Salt | 1–2 tsp non-iodized, to taste |
Acidify cold
Stir the citric-acid solution into the cold milk. Slowly heat to 90°F (32°C), stirring.
Set
Off heat, stir in the diluted rennet with gentle up-and-down strokes for ~30 seconds. Cover and rest 5–10 minutes until you get a clean break.
Cut & heat
Cut the curd into 1-inch cubes. Return to low heat to ~105°F (41°C), stirring gently; the curds firm and the whey turns yellow-green.
Drain & stretch
Scoop curds into a bowl. Heat a separate pot of water to ~175°F (80°C). Wearing rubber gloves, dip a handful of curd into the hot water for 30–60 seconds, then fold and stretch it until smooth and glossy, like taffy. Don't over-work it — it toughens.
Shape & chill
Salt the stretching water or the curd, form into balls, and drop into cold/iced water to set the shape. Eat the same day for the best texture.
Cultured method & burrata
For deeper flavor, replace citric acid with a thermophilic culture: warm the milk, add culture, ripen ~45–60 minutes, then add rennet, set, cut, cook, and — crucially — let the drained curd sit until it reaches the pH 5.2 stretch window (often a few hours). Then stretch as above. It is more work and far better.
- Burrata: stretch a thin sheet of mozzarella, line a cup with it, fill with stracciatella (torn mozzarella shreds soaked in cream), and pinch closed into a pouch. Eat within a day.
- Bocconcini / ciliegine: simply form small balls; store in lightly salted whey or water.
- Scamorza / smoked: shape, air-dry a day or two, optionally cold-smoke — a brief bridge toward aged styles.
Sources & further reading
- Gianaclis Caldwell, "Mastering Artisan Cheesemaking" (2012)
- Ricki Carroll, "Home Cheese Making" (3rd ed.)
- Paul Kindstedt — the chemistry of curd stretching and pH