In a medium bowl, mash the bananas until they are almost pureed. Add the eggnog, oil, apple cider vinegar, and vanilla. Set aside. Preheat the oven to a warming setting, and set a parchment-lined baking sheet on the top rack.

In another large mixing bowl, sift together the flour, baking powder, nutmeg, and salt. Make a well in the center and pour in the banana mixture. Use a fork to gently mix everything together until you have a lumpy batter. This should take about a minute. Don't mix until smooth! Lumps are totally fine as long as all ingredients are well-incorporated and there aren't any dry flour spots. Let the batter rest for 10 minutes.

Preheat a large nonstick pan (Isa recommends cast iron) over medium-low heat. Using a brush, lightly coat the pan with coconut oil. Drop pancake batter into the pan by the 1/3 cup. Cook pancakes until puffy and holes are poking through, about 4 minutes. Flip the pancakes and cook until the other side is golden brown, about 3 minutes. Transfer cooked pancakes to the baking sheet in the oven. Re-grease the pan and keep making pancakes until the batter runs out.