Prepare the Custard: In a large mixing bowl, vigorously whisk together the eggs, whole milk, heavy cream, granulated sugar, vanilla extract, ground cinnamon, and salt until the mixture is smooth and well combined.
Layer the Bread: Take the slices of brioche bread and arrange them neatly in a greased 9x13 inch baking dish. You may overlap the slices slightly to make sure they all fit.
Soak the Bread: Pour the prepared custard mixture evenly over the brioche slices, ensuring that each piece is thoroughly soaked. Gently press down on the slices with a spatula to ensure they are all submerged in the custard.
Chill Overnight: Cover the baking dish tightly with plastic wrap and place it in the refrigerator overnight. This allows the bread to fully absorb the custard, enhancing the flavor and texture.
Preheat the Oven: The next morning, preheat your oven to 350°F (175°C), ensuring it is ready for baking.
Bake the French Toast: Once preheated, remove the dish from the refrigerator and discard the plastic wrap. Bake the French toast in the preheated oven for 35-40 minutes, or until the top is a golden brown and the custard has set.
Cool Slightly: Once baked, remove the dish from the oven and allow it to cool for about 5-10 minutes.
Caramelize the Topping: Sprinkle the brown sugar evenly over the top of the dish. Using a kitchen torch, carefully caramelize the sugar until it bubbles and transforms into a rich amber color. If you don’t have a torch, you can achieve a similar effect under the broiler for 1-2 minutes; just be vigilant to prevent burning.
Let it Set: Allow the caramelized sugar to cool for a few minutes until it hardens, creating a delightful crispy topping.
Serve and Enjoy: Serve your luxurious French toast warm, garnished with fresh berries and a dusting of powdered sugar for an extra touch of sweetness and visual appeal.
Notes
For an elegant touch, plate individual servings topped with a sprig of mint alongside a handful of berries.