Individual Yoghurt containers 30% failure !?!?
So i bought i yoghurt maker with individual containers and a culture starter kit. Ive read the maker is quite good but im having trouble with it.
This is the third batch I’ve made and the results are getting better , 50% success to 70% now. The process i follow
Long Life Quality milk 1.5 Litres
Heat milk to 80 Degree C for 25 minutes.
Cool Milk to 42
Add starter culture (Ive tried one bag and two the last run)
Stir
Ladle out the milk into the individual cups while constantly slow stirring to ensure consistency.
Results
Some of the cups are perfect thick creamy yoghurt , Some are still milk after 12 hours. The last time i made sure i ladled out the milk into order to see if it was a consistency issue but there seems to be no correlation The first one was perfect the second milk and the last two perfect also. It’s not like the last few are milk.
I’m suspecting there is an inconsistency in the heating of the maker where some maybe getting to hot and killing the culture. I will put some water in each cup when im finished this batch and test the temperature.
Couple of thoughts :- Should i be using water to even out the temperature ? The instructions dont suggest so. Also i put the lids on after ladling out the milk should i wait till after they set ?
Any other hints from the experts ?
Thanks