Do you defrost blueberries for muffins?

It is not necessary to defrost blueberries before adding them to muffin batter. Frozen blueberries will work just fine in muffins, and they will actually help to keep the muffins moist. However, if you do want to defrost your blueberries, you can do so by placing them in a colander and running cold water over them. Be sure to pat the blueberries dry before adding them to the batter.