Preheat the oven to 200 degrees Celsius / 390 degrees Fahrenheit. Place a cast iron or heavy based pan into the oven until hot.
In a blender, add the eggs, flour, milk, sugar and vanilla essence. Blend on high until all ingredients are well combined.
Carefully remove the pan from the oven and melt the butter into it. Swirl it around to ensure the bottom and sides are coated by the butter. Once the butter is melted, add the dutch baby mixture to the hot pan. Bake for 15 minutes.
Allow to slightly cool then remove from the pan. Serve with Driscoll's Sweetest Batch Blueberries, lemon juice and icing sugar.