Mason jars can sometimes go in the microwave, but you have to be careful.
The jar type, temperature change, and metal lid all matter.
Can you microwave mason jars?
TL;DR
Sometimes. Remove the metal lid and only microwave jars that are safe for microwave use.
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Never microwave a mason jar with the metal lid or ring attached. Metal can spark and damage the microwave.
Even with the lid removed, sudden temperature changes can crack glass. Do not take a cold jar straight from the fridge or freezer and blast it with high heat.
Use short heating intervals, stir when possible, and stop if the glass seems stressed or unusually hot.
Mason jars can be useful, but they are not automatically microwave proof. Remove metal and avoid sudden temperature shock.
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