Step 1: Preheat oven to 425°F (220°C).
Step 2: In a medium bowl, whisk together eggs, flour, milk, sugar, and salt until smooth.
Step 3: Place butter in a 10-inch ovenproof skillet or baking dish and melt in the preheated oven for 2-3 minutes.
Step 4: Remove skillet from oven and swirl melted butter to coat the bottom and sides.
Step 5: Pour batter into the hot skillet and immediately return to the oven.
Step 6: Bake for 20-25 minutes until puffed and golden brown around the edges.
Step 7: Remove from oven, dust with powdered sugar, and serve immediately with fresh berries.