Whisk the flour, baking powder, sugar, and salt in a large bowl.
Add the egg, milk, and vanilla extract.
Whisk gently until smooth. Do not overmix.
Rest the batter for 10 minutes.
Heat a large nonstick skillet over medium-low heat and grease lightly with butter.
Pour 1 to 1 1/4 cups of batter into the skillet and spread gently into a large round pancake.
Cook for 3 to 4 minutes, until bubbles form and the edges look set.
Flip carefully and cook for 2 to 3 more minutes until golden.
Repeat with the remaining batter.
Serve warm with raspberries, powdered sugar, and syrup.