Hi everyone
I have been fermenting yoghurt with powdered milk and lacto starter sachets. Mix powder with cold war in a plastic container which goes inside plastic insulating vessel filled with boiling water.
I've been having a freak-out about plastic and food recently though:
http://www.motherjones.com/environment/ ... stic-safe/
So I tried the same process with a glass container inside the plastic insulating vessel filled with boiling water. No go. Glass container has the same volume so ratios are the same. Must be a temperature thing. Then I tried mixing the powder with water (between 115F/46C-110F-43C) and placing in a bath of the same temperature - again, no luck.
Any ideas?