1. Prepare the Casserole:
- Layer the Bread and Bananas:
- Grease a 9×13-inch baking dish. Spread half of the cubed bread evenly in the dish, then top with half of the sliced bananas. Repeat with the remaining bread and bananas, creating layers.
- Make the Custard:
- In a large mixing bowl, whisk together the eggs, milk, heavy cream, granulated sugar, brown sugar, vanilla extract, cinnamon, nutmeg, and salt until well combined.
- Pour the Custard:
- Slowly pour the custard mixture over the bread and bananas, ensuring that all the bread is soaked. Press down gently on the bread with a spatula to help it absorb the custard.
- Chill Overnight:
- Cover the dish with plastic wrap or aluminum foil and refrigerate overnight, or for at least 4 hours. This allows the bread to fully absorb the custard.
2. Prepare the Streusel Topping:
- Mix the Streusel Ingredients:
- In a medium bowl, combine the flour, brown sugar, and cinnamon. Add the cold butter cubes and use a pastry cutter or your fingers to mix until the mixture resembles coarse crumbs. Stir in the chopped nuts if using.
- Refrigerate the Streusel:
- Cover and refrigerate the streusel topping until ready to use.
3. Bake the Casserole:
- Preheat the Oven:
- Preheat your oven to 350°F (175°C). Remove the casserole from the refrigerator and allow it to come to room temperature while the oven heats.
- Add the Streusel:
- Sprinkle the chilled streusel topping evenly over the casserole.
- Bake:
- Bake the casserole for 45-55 minutes, or until the top is golden brown and the custard is set. If the top browns too quickly, cover it loosely with foil.
- Cool Slightly:
- Allow the casserole to cool for 5-10 minutes before serving.
4. Serve the Casserole:
- Garnish:
- Serve the casserole warm, topped with a drizzle of maple syrup, a dusting of powdered sugar, and extra sliced bananas for garnish.
- Enjoy:
- Dig in and enjoy the comforting, sweet flavors of banana French toast in every bite.
Conclusion
This Overnight Banana French Toast Casserole is the perfect blend of convenience and indulgence. The rich custard soaks into the bread overnight, and the sweet bananas add a deliciously fruity note. The streusel topping brings a delightful crunch that contrasts beautifully with the soft, custardy interior. Serve this dish for a special breakfast or brunch, and watch as it quickly becomes a family favorite. Whether you’re hosting guests or simply treating yourself, this casserole is sure to impress!