Place 10-12 inch cast iron pan into oven and preheat to 475 F.
Add eggs to medium bowl and whisk until light, then whisk in milk.
2 Eggs, 1/2 cup Milk (or non dairy substitute)
Add any optional flavorings if desired
1 tsp Vanilla, 1/2 tsp Cinnamon, 1/2 tsp Nutmeg, 1 tsp Lemon zest
Add flour and salt to bowl then stir until combined.
1/2 cup Flour, 1 pinch Salt
Once oven is preheated, remove cast iron pan and melt butter (about 2 tbsp) in bottom, swirl to coat sides.
Butter
Pour mixed batter into pan and return to oven
Add desired inclusions (if any) on top of batter
Blueberries, Chocolate chips, strawberries
Bake until puffed up and light brown. About 12-15 min
Remove from oven and dust with icing sugar if desired
Icing sugar
Allow to cool (puffyness will start to fall)
Slice and enjoy!