1Preheat oven to 425 degrees F (220 degrees C). Generously butter a 2 1/2-quart baking dish.
2Pour blueberries into prepared baking dish.
3Blend milk, sugar, flour, eggs, vanilla extract, and salt in a blender until batter is smooth. Pour batter over blueberries and gently shake to remove any air bubbles.
4Bake in the preheated oven until puffed and center is set, 25 to 30 minutes. Cool until clafoutis deflates and is just warm.
Footnotes
Tip
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.