Curd knife and slotted ladle
A curd knife cuts set milk into recipe-sized pieces; a perforated ladle lifts and moves curd while whey drains. The hand tools work at different moments in an open cheesemaking vessel.
Quick acidified mozzarella
quick acidified mozzarella · 30-minute mozzarella
A stretched fresh curd made by acidifying cold milk with citric acid before adding rennet, so the curd can be stretched as soon as it has formed.
A stretched curd without a culture stage
Quick mozzarella is a direct-acidified shortcut to a stretched fresh curd. Citric acid, diluted in cool water, goes into the milk before the rennet, so the curd is acid-assisted and can be stretched soon after it has set. The method is a modern home shortcut; the sources used here do not date it.
The older pattern for a stretched curd works differently. O'Connor's 1993 ILCA manual describes a culture that develops acidity in the milk before the curd is stretched in water at 80–85 °C (176–185 °F). The quick version replaces that culture stage with added acid. This page does not claim that the two give the same flavour or texture.
Sources for this section
Why the crock leaves the heat
In the demonstration the slow-cooker crock is lifted out of its heating base twice. The first lift stops the heat before the rennet set, so the milk rests undisturbed for 15 minutes. The second lift stops the heat while the cut curds are stirred at 105 °F (41 °C). The source notes that the hot ceramic keeps giving off heat after each lift, and it does not record how far the milk overshoots.
The milk is pasteurised and homogenised. Penn State Extension states that ultra-pasteurised and UHT milk interfere with curd formation, and it does not recommend raw milk for home cheesemaking, so those are the milk types this route is tied to.
Stretching and reading the result
After draining, the curd is heated in short bursts in the microwave and kneaded between them, first for one minute and then twice more for 35 seconds each. Salt is worked in after the last heating, and the curd is stretched by hand.
The sources describe one cook's demonstration with one cooker and one batch. It is not a tested universal slow-cooker schedule. The temperatures are read from a probe in the milk, not from the cooker dial, and the source's own limits are kept in the notes above.
Sources for this section
What the sources leave open
Ingredient quantities: not printed on the slow-cooker page; the linked recipe could not be read.
Yield: not printed.
Storage: not stated.
Temperature overshoot after lifting the crock: not recorded in the demonstration.
History
A modern direct-acidified shortcut. O'Connor's 1993 ILCA manual shows the older pattern for a stretched curd (scamorza), where a culture develops the acidity before stretching in 80–85 °C water.
Ingredients
Scaling: source batch only
Amount not stated
quantity not printed on the source pageCitric aciddiluted in cool non-chlorinated water
Amount not stated
quantity not printed on the source pageNon-chlorinated watercool, for diluting the citric acid and the rennet
Amount not stated
quantity not printed on the source pageDouble-strength liquid vegetable rennetdiluted in non-chlorinated water shortly before the milk reaches 95 °F
Amount not stated
quantity not printed on the source pageAmount not stated
quantity not printed on the source pageMethod
Risks and precautions · Standard risk
Unsuitable milk
The demonstration uses pasteurised, homogenised milk. Penn State Extension says ultra-pasteurised and UHT milk interfere with curd formation and does not recommend raw milk for home cheesemaking.
Hazard sourceRead the milk temperature with a probe in the milk rather than relying on the cooker setting
Control sourceThe source gives no storage time or safety statement; do not infer one.
- Remove the handle from the slow-cooker lid, push a timer-thermometer probe through the opening so it sits in the milk, and tape the wire down.
- Add the citric acid, diluted in cool non-chlorinated water, to the crock, then stir in the milk straight away.
- Cover and heat on High until the milk reaches 95 °F (35 °C). Dilute the rennet in non-chlorinated water shortly before that point.
- At 95 °F lift the crock out of the heating base. Stir in the rennet with an up-and-down motion for about 30 seconds.
- Cover and leave the milk completely undisturbed for 15 minutes.
- Cut the curd in a checkerboard pattern.
- Return the crock to the base on High and heat the curds to 105 °F (41 °C), stirring slowly.
- At 105 °F lift the crock out again and keep stirring slowly for 2 to 5 minutes; the demonstration used 5 minutes for a firmer cheese.
- Drain the curds in a colander lined with a flour-sack towel.
- Microwave the curd in a heat-safe bowl for 1 minute, pour off the whey and knead with gloved hands.
- Microwave twice more for 35 seconds each, draining and kneading after each heating.
- Work in the cheese salt after the last heating, then stretch the curd.
Conditions
Temperature35–40.6°C
Temperature controlMulti-stage
Places
Tucson, Arizona
Documented use · Locality evidencewhere the photographed slow-cooker demonstration was made; not an origin
Related
Equipment
Slow cooker
An electric slow cooker warms a removable heavy crock under a lid. Stored heat aids gradual cooking, but its settings are not a universal fermentation thermostat.
Read more
A slow cooker as a small dairy
A slow cooker can heat milk for mozzarella, paneer, ricotta, mascarpone, quark and yogurt, but its heavy crock keeps heating after it is switched off. This is what each fresh cheese needs from it.
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Citric-acid-and-rennet mozzarella
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Sources
New England Cheesemaking Supply CompanyMethod · Equipment
Making Mozzarella in the Slow Cookeringredients
every step and temperature
probe setup
Cited in: A stretched curd without a culture stage; Why the crock leaves the heat; Stretching and reading the result; What the sources leave open
Penn State ExtensionSafety
Home Cheesemaking (Penn State Extension, K. E. Kaylegian)UP/UHT milk interferes with curd formation
raw milk not recommended for home cheesemaking
Cited in: Why the crock leaves the heat; What the sources leave open
ILCAHistory
Traditional cheesemaking manualscamorza culture-acidified stretched curd for comparison
Cited in: A stretched curd without a culture stage; What the sources leave open