Originally Posted by Jack
Or you can pull some of your mash out of the MLT and conduct a fake decoction to get it to mash out temperature. This can be particularly useful if you would overflow your mash tun by adding any more water.
That's a mash out decoction, nothing fake about it at all.
I use one every batch. Pull a nice thin decoction of about 50% of your mash (but do include some grains, you need the thermal mass), boil it for 10-15 minutes and add it back in.