Oven-Baked Blueberry Pancake

Ingredients

• all-purpose flour
• tablespoons plus 1 teaspoon granulated sugar
• teaspoons baking powder
• teaspoon coarse salt
• whole milk
• large egg, room temperature
• tablespoons unsalted butter, melted, plus 1 tablespoon for pan
• blueberries
• Confectioners' sugar, for serving
• Maple syrup, for serving