For tall muffins that look like they belong in a fancy bakery, try chilling the muffin batter overnight before baking. This technique produces the best results. Additionally, if you find that your muffins tend to stick to the liner, it may be caused by the brand of liners. Consider using a high-quality brand to prevent sticking. If your muffins still stick, there are tips available on how to prevent muffin or cupcake liners from sticking.