Epimeles — Japanese Soufflé Pancakes

Ingredients

• 4 egg whites and 2 egg yolks from 4 large eggs, separated and chilled
• 6 tablespoons granulated sugar
• 2 teaspoons vanilla extract
• 1 teaspoon baking powder
• 6 tablespoons cake flour
• ¼ cup milk, chilled
• ½ teaspoon fresh lemon juice
• ½ teaspoon kosher salt
• Unsalted butter, for greasing and serving
• Maple syrup, for serving
• Confectioners’ sugar, whipped cream and fresh berries, for serving (optional)