Preheat oven to 425°.
Lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, soy milk, granulated sugar, and eggs in a bowl, stirring with a whisk until smooth. Pour mixture into a medium nonstick skillet coated with cooking spray. Wrap handle of pan with foil.
Bake at 425° for 18 minutes or until puffy and golden. Top with raspberries; sprinkle with powdered sugar. Serve immediately.