How to Make It
Preheat oven to 425°F, and place a 10-inch skillet in the oven to preheat as well.
While the oven is preheating, combine 3 eggs, 1/2 cup milk, 1/2 cup all-purpose flour, 1 Tbsp. sugar, 1/2 tsp. lemon zest, and a pinch of salt in a blender. Blend until completely homogenous.
Once the oven is preheated, carefully remove the skillet and place 4 Tbsp. unsalted butter into the skillet. Swirl butter in skillet until completely melted.
Pour batter into the skillet and bake for 20 minutes. Lower the oven temperature to 300°F and finish baking for another 5 minutes.
You must be sure that your oven is preheated before placing the batter into the oven. The initial burst of heat on contact with the batter allows the pastry to puff and create the distinct shape of an oven pancake. You can also experiment by adding spices like cinnamon and nutmeg for a particularly flavorful pancake.