Creating French Toast Casserole is simple when you follow these easy steps:

1. Prepare the Bread: Begin by cubing the brioche or challah bread into bite-sized pieces. Place them in a large mixing bowl.
2. Whisk the Eggs: In a separate bowl, whisk together the eggs until well combined.
3. Mix the Wet Ingredients: Add the milk, heavy cream, granulated sugar, vanilla extract, cinnamon, nutmeg, and salt to the eggs. Whisk until smooth.
4. Combine Mixtures: Pour the egg mixture over the cubed bread. Gently fold the bread into the mixture, ensuring all pieces are well coated.
5. Chill the Casserole: Cover the bowl with plastic wrap and refrigerate for at least 4 hours or overnight. This allows the bread to absorb the liquid.
6. Preheat the Oven: When ready to bake, preheat your oven to 350°F (175°C).
7. Prepare the Baking Dish: Grease a 9×13 inch baking dish with butter or cooking spray.
8. Transfer the Mixture: Pour the soaked bread mixture into the prepared baking dish, spreading it evenly.
9. Bake: Place the casserole in the preheated oven and bake for 45-50 minutes, or until the top is golden brown and a toothpick comes out clean from the center.
10. Cool Slightly: Allow the casserole to cool for about 10 minutes before serving.

By following these steps, you’ll create a delicious French Toast Casserole that is sure to become a favorite in your home!