Apparently I found a new template... I think I like it. More "Prairie Sky"-like.
Anway.
So I've been making yoghurt again lately. It was something I'd fallen out of the habit of doing, actually for so long that I'd forgotten exactly how it's done. I looked up the instructions, and made a batch up, quick as that.
Now, almost every recipe says to heat the milk to 185 degrees, and I never figured out why. I always assumed that it was to kill any pathogens, but since we buy pasteurized milk that wasn't a concern. (Not that it would be much of a concern anyway, if I could find myself raw milk from a local farmer, but that's not the point of the story.) In any case, not being the adventurous type, I always followed those directions to the letter.
Except last time. Last time I rebelled. "Self," I said, "Branch out. Live large. Try heating that milk to a mere 110 and see what happens."
What happens, dear readers, is yoghurt soup. It's got all the tangy bacterial stuff goin' on, but it doesn't thicken. So I went web-picking, and found out that this is because:
"At that temp (referring to 185 degrees), the whey proteins will denature and coagulate to enhance the viscosity and texture."
- Some ask-a-question site.
- Some ask-a-question site.
There you have it. This afternoon, I, much chastened, heated my milk to 185. I like my yoghurt thick.
I know that sometime in my distant past I posted a how-to on yoghurt making, but in case any one round these parts wants to know, here it is again.
You need:
Milk, about as much as you'd like to see turn into yoghurt.
Plain yoghurt, as stuffed full of pro-biotics as you can find, a few tablespoons or so.
Cooking thermometer.
Cheesecloth (optional).
In a large saucepan, slowly heat the milk to 185 degrees, stirring occasionally so it doesn't cook to the bottom. When I got it there this time, I turned off the burner and put the lid on for a few minutes, which supposedly enhances the thickening process. (I'll let you know how that works out later.)
Once that heat has been reached, set the pan into a few inches of cold water in the sink. Cool it to 110 degrees. Take it out of the water. Stir in your yoghurt, which will start the bacterial process.
Keep your lidded yoghurt warm for at least 8 hours, or better yet, overnight. I've done this overtop a heating vent in the winter when the furnace is going all the time, with a cardboard box over the saucepan to keep the heat in. (This is why you need to keep the lid on, so you don't enrich your yoghurt with dust.) I've also done it by turning the light on in the oven overnight, covering the stove-top vent, and letting it do its time there. Right now my yoghurt is on the outside railing, where the sun was pretty strong. That's about to change, and I notice the sky is already getting dark, so maybe I'll try Chive's idea of putting it in the big cooler with a hot water bottle.
After it's had its working time, you can either just use it as is, or strain it with cheesecloth. I did that the time before last, and quite liked the extra "dryness" of the end product. I put the whey on the compost heap. Does anyone else have any other ideas for it?
Then put the yoghurt into whatever container suits your fancy. Not so hard, huh?