To achieve bakery-quality blueberry muffins, follow some essential tips. First, make sure your ingredients are at room temperature; this helps to create a smoother, more uniform batter. When combining the dry and wet ingredients, mix just until no dry flour is visible—overmixing can lead to dense muffins. Use fresh blueberries when possible, as they provide the best flavor, but if using frozen, ensure they are coated with cornstarch to avoid excess moisture. Additionally, for an impressive rise and a perfect dome, remember to preheat your oven adequately. Finally, checking for doneness by inserting a toothpick into the center is crucial; it should come out clean or with a few moist crumbs clinging to it. Following these steps will help you produce delicious blueberry muffins consistently.