Yes! To get nice crispy results, the best method for reheating pão de queijo is the oven.  Preheat the oven to 350 degrees F. Place your Brazilian cheese bread on a baking sheet and pop it in the oven for about 5 minutes. Keep a close eye on the bread to make sure it doesn’t burn. Mini-muffins can heat up fast.  If you are in a rush, you can reheat it by wrapping the bread in a paper towel and sticking it in the microwave for about 20 seconds. It will get warm, just not crispy.