Preheat oven to 425F. Put a cast iron skillet or 9 inches stone pie pan in the oven.
Besides butter, blend all ingredients in Vitamix blender until smooth.
After oven heated to desired temperature, take skillet out, melt butter in the skillet, pour batter in.
Bake in oven about 20 minutes with 425F.
Serve hot with either sweet or salty side dishes.
1. Skillet must be preheated in oven. 2. Room temperature ingredients help rising up.