Mix cinnamon and sugar together.
Preheat oven to 425 with ovenproof dish inside (we use a seasoned stainless steel frying pan). When preheated add butter for around 3-4 minutes until hot but not overly browning, just before adding pancake mixture.
Mix first 3 ingredients by hand or paddle attachment of a kitchen aid. Pour into preheated pan with melted butter. Sprinkle with cinnamon and sugar mix. Bake until golden brown and puffed up, around 20 minutes. Serve immediately.