Raspberry Gratin

Name: Raspberry Gratin
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: French
Ingredients: 1 ½ cup whole milk (1 ½ cup whole milk); 3 eggs yolks (3 extra-large egg yolks); ½ cup granulated sugar (½ generous cup granulated sugar); 2 tablespoons corn starch (2 tablespoons corn starch1); 1 teaspoon corn starch (1 teaspoon corn starch); 2 tablespoons unsalted butter (2 tablespoons unsalted butter); salt (pinch of salt); 1 cup creme fraiche (1 cup creme fraiche); 3 raspberries (3 baskets of raspberries); 2 tablespoons powder sugar (2 tablespoons powder sugar)