Chocolate PB Banana Skillet Cake

1 Preheat your oven to 350 degrees F. Grease your cast iron skillet if it isn't greased already and set aside.
2 In a large bowl, mix together the wet ingredients until slightly fluffy. About 1 minute.
3 Add the dry ingredients and mix until just combined.
4 Bake for 18-20 minutes. The center will still be soft but a toothpick should pull out clean.
5 Let the cookie cool completely in the skillet before slicing and serving. About 30-60 minutes. Or you can be like me and eat it immediately with a spoon right out of the skillet.