Serve immediately topped with fresh berries and powdered sugar.
4 large eggs 1 cup whole milk 1 cup all-purpose flour ¼ cup granulated sugar ½ teaspoon finely grated fresh lemon zest ¼ teaspoon salt 2 tablespoons unsalted butter 1 cup blueberries, plus more for topping Confectioners' sugar, for sprinkling
Preheat oven to 400°F. Blend together eggs, milk, flour, granulated sugar, lemon zest, and salt in a blender. Heat four cast-iron skillets on the stovetop over high heat. Divide butter among the skillets and melt. Divide the batter among the skillets and scatter with blueberries. Bake until puffed and cooked through, 15 to 18 minutes. Top with additional berries and sprinkle with confectioners' sugar. Serve immediately.
