Preheat the oven to 350°F / 180°C ( 320°F convection / 160°C fan). Pit 450 g fresh cherries using a cherry pitter and set them aside.
Brush a 9-inch (23 cm) baking dish with 10 g unsalted butter, melted, then sprinkle in 20 g granulated sugar. Tilt the dish to coat the bottom and sides, then shake out any excess.
In a mixing bowl, whisk 3 large eggs, 80 g granulated sugar, ¼ tsp sea salt, and 1 tsp vanilla extract until smooth and slightly frothy.
Sift in 35 g all-purpose flour and whisk until the batter is smooth with no visible lumps.
Slowly whisk in 100 ml whole milk, 130 ml heavy cream, and 30 g unsalted butter, melted, until fully combined.
Arrange the pitted cherries evenly in the prepared baking dish, then gently pour the batter over the top.
Bake for 35–40 minutes, or until the cherry clafoutis is puffed, lightly golden, and just set in the center.
Let it cool slightly before serving warm or at room temperature.
Notes
Whisk the Batter Well: I like to whisk the eggs and sugar until slightly frothy because it helps give the clafoutis a soft, delicate texture once baked.Pour the Batter Slowly: Pouring the batter gently over the cherries is something I like to do so they stay evenly spread across the dish.Do Not Overbake: I always take the clafoutis out when the center still has a slight softness because it continues setting as it cools.Serve Slightly Warm or Chilled: This is one of those desserts I enjoy both ways, but I especially like it chilled the next day when the custard texture turns even creamier.