Wrap the fermenting jars with towels, or anything else to insulate the jars, or just put
the jar in the microwave oven, and close it.
Not exact matches
Alternatively, you might use a covered container, set
in a conventional
oven (preferably with the light on), a
microwave, a cooler (place
jars of hot water inside to help maintain a warm environment), or a slow cooker (preheat the slow cooker but turn it off to incubate).
Never heat commercial baby food
in the
jars, because they could crack or break when heated
in the
oven, boiling water or the
microwave.
As soon as the brownies are out of the
oven, place the
jar of caramel sauce without the lid
in a
microwave and heat just until it's pourable.