Preparation Put a 12-inch ovenproof heavy skillet in middle of oven and preheat oven to 450°F. Whisk together flour, eggs, sugar, vanilla, salt, and 1 1/2 cups milk in a bowl. Add butter to skillet and heat in oven until golden, about 1 minute. Pour batter into skillet and bake until puffed, set, and golden, 20 to 25 minutes. Meanwhile, whisk together Nutella and remaining 3 tablespoons milk until smooth. Thin sauce with additional milk if necessary. Cool pancake in skillet on a rack 5 minutes (it will sink). Dust with confectioners sugar and drizzle with sauce. Serve with berries.
Preparation Put a 12-inch ovenproof heavy skillet in middle of oven and preheat oven to 450°F. Whisk together flour, eggs, sugar, vanilla, salt, and 1 1/2 cups milk in a bowl. Add butter to skillet and heat in oven until golden, about 1 minute. Pour batter into skillet and bake until puffed, set, and golden, 20 to 25 minutes. Meanwhile, whisk together Nutella and remaining 3 tablespoons milk until smooth. Thin sauce with additional milk if necessary. Cool pancake in skillet on a rack 5 minutes (it will sink). Dust with confectioners sugar and drizzle with sauce. Serve with berries.