Has anyone tried mashing ata lower temperature then raising the temperature without removing the wort using an induction hob and pot? Just worried about scorching the grain near the heat source. Suppose I could stir the grain if required but that's not easy for a big beer so was wondering what others experiences were
Dunno about an induction hob but for a decoction mash on a direct heat source you need to stir pretty much the whole time.
You'd probably need to control induction power similarly to rims/herms and recirculate if you don't intend to stir and watch like a hawk.
I recall an add for a kitchen utensil that you put into a pan and it continued to stir the contents to stop them sticking to the bottom of the pot.
This device maybe? Looks interesting, but you'd lose a tonne of heat out the top with it attached. https://www.amazon.co.uk/Stirio-Automatic-Adjustable-Pot-Stirrer/dp/B00GQZ44EG
I think for step mashing on an induction hob, your best bet is infusion mashing instead of direct heat. Set aside some of your mash water in another pot and bring it close to a boil. Then add it gradually to the main portion of the mash until you hit your rest temperature. Same procedure for each step, just add the near-boiling water until you hit rest temp. There are calculators online that will help you calculate the volume needed to bring your mash to a certain temp, but they should be used as a guide only. If you have water left over at the end, cool it to the rest temperature. If the temperature is too low, add direct heat while stirring. There's no real easier way to do it.