How do you adjust the oven temperature and baking time when baking mini or jumbo muffins from a traditional muffin recipe? —N.I., South Kingstown, Rhode IslandGenerally, the oven temperature will not need to be adjusted when baking mini or jumbo muffins, but the baking time will most likely need to be altered. Mini muffins will take anywhere from 10 to 15 minutes while jumbo muffins will bake from 20 to 40 minutes. Check jumbo muffins for doneness after 20 minutes, then every 5 to 10 minutes. Keep in mind that the baking time will vary according to the recipe. The variation is due to the oven temperature and the amount of batter in each muffin cup.