Preheat a 12” non-stick skillet over medium-low heat for 3 minutes.
Cook 4 muffins at a time. Transfer dough balls to the skillet with 2 spatulas, using the cornmeal to prevent dough sticking to the spatulas. Once the dough is in the pan, give each dough ball a few firm smacks with a spatula to slightly flatten out.
Cover with a lid and cook until the bottoms are lightly golden, about 6 minutes. Halfway through, remove the lid and gently rotate the muffins with hands or spatulas for even cooking. Replace the lid and keep cooking.
When the bottoms are lightly golden, use spatulas to flip over each muffin. Once flipped, give each a few more smacks with a spatula.
Keep cooking, with lid off, until the other side is also lightly golden, about 6 minutes, rotating half way.
When both sides are evenly golden brown and the muffins have been in the skillet for ~12 minutes total, check if done by taking internal temperature which should be at least 200F (93C).
Transfer to a wire rack to cool then move on to the next batch.
Let muffins cool for at least 15 minutes on the tray.
Split in half by poking all the way around the circumference of a muffin with a fork, then pulling the two perforated halves apart
Leftover muffins should be split in half, then put back together, sealed tightly, and frozen. When ready to eat, pull out frozen muffin and divide the two halves. Cook in a toaster until golden and crisp, which may take slightly longer than usual. They’ll taste as good as if they were fresh!