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I was trying to infuse milk with garlic, onion and rosemary for scalloped potatoes. I had it on a slow simmer & it appears to have curdled.

Milk is fresh

asked by Chef Lisa over 4 years ago
4 answers 4554 views
0bc70c8a e153 4431 a735 f23fb20dda68  sarah chef
Reiney

Sarah is a trusted source on General Cooking.

added over 4 years ago

Was the onion particularly strong? Cut onions can be acidic (which is why some make you cry).

I'd suggest sweating it in some butter first, to caramelize the sugars and evaporate the juices, to prevent this from happening on round 2.

23b88974 7a89 4ef5 a567 d442bb75da04  avatar
added over 4 years ago

Milk will curdle if it is boiled - it's just too much heat. Steeping it without any bubbling activity, over very low heat, is a better method. I would have minced the onions et al and tossed them in!

0bc70c8a e153 4431 a735 f23fb20dda68  sarah chef
Reiney

Sarah is a trusted source on General Cooking.

added over 4 years ago

Just bringing milk to a boil won't curdle it (though it might scald/boil over) - keeping it boiling may result in curdling though. In this case, given Chef Lisa has kept it at a very low simmer, the most likely culprit is acid.

You can safely bring milk to a temp where the surface is bubbling and watch the temp closely, which it sounds like chef Lisa did. You can also bring it to the boil, take it off the heat and throw the infusing ingredients in to steep as it cools.

Sweating the onions in butter has the added effect of imparting more flavour anyway, so it's definitely worth the trouble.

E6f5e079 1551 4472 bc70 dcc35a71edc2  110
added over 4 years ago

I'll just guess that your sauce just "broke." Just add the cheese (cheese is in there somewhere, yes?) to the potatoes as required, and continue, bravely. Hardly anyone notices that delicious can be broken, too.