Greasing the pan ensures that the muffins won’t stick to the pan after they’ve baked. Using muffin wrappers lets you skip the process of greasing the pan and ensures that the muffins will come out of the pan easily after they’ve baked.
Smooth the tops of the batter with a spoon if they’re uneven on top. You can also hold the muffin tin in each hand and shake it gently side to side to make sure that the batter lays flat in each insert.
