Preheat a cast iron skillet and coat it well with butter over medium heat. Using a 1/8 cup measuring cup, scoop the batter on to the hot skillet and keep a watchful eye on them. Unlike a thinner batter, these won’t bubble up in the middle when they’re ready to flip, so you’ll know you can flip them when they begin to look a little bit set. You can use a spatula to take a peek on the bottom of one and flip when it’s nicely golden. Flip them and cook just a couple minutes more.