This Eggnog French Toast Breakfast Casserole is the best breakfast casserole for holiday mornings. With its rich custard mixture made from creamy eggnog, brown sugar, and warm spices, this dish will have your whole family gathering around the table. Topped with a buttery crisp topping and served with a drizzle of maple syrup, it’s a great option for celebrating special occasions like Christmas morning or just treating yourself to an indulgent sweet breakfast.
In a medium pan, whisk together the eggnog, whole milk, bourbon vanilla extract, teaspoon cinnamon, nutmeg, and butter on medium heat. Simmer for 5 minutes.
Set the milk mixture aside to cool while you prepare the bread.
Chop the Bread
Use day-old bread for best results. Cut the brioche bread into 1-inch cubes and layer half of them into a parchment-lined baking dish.
Add the Eggs to the Custard
Whisk the large eggs into the cooled custard mixture, ensuring it’s well combined.
Assemble the Casserole
Sprinkle half of the cinnamon sugar mixture over the first layer of bread.
Add the remaining bread cubes and gently press them down.
Pour the custard mixture evenly over the bread, ensuring every piece is soaked. At this point, let it sit on the counter for 30 minutes or overnight in the fridge.
Make the Crumble Topping
In a medium bowl, combine the flour, remaining cinnamon sugar, and cold butter. Blend in a blender until nice and crumbly.
Sprinkle the crisp topping evenly over the casserole.
Bake the Casserole
Preheat your oven to 375°F.
Place the casserole in the preheated oven and bake for 35 minutes, or until the top is golden brown and the custard is set.
Prepare the Bourbon Syrup
In a small bowl, combine maple syrup, bourbon, and unsalted butter. Heat over low-medium heat until the butter melts and the syrup is warm.
Serve and Enjoy
Drizzle the bourbon syrup over the casserole before serving.
Optionally, add toppings like fresh fruit, powdered sugar, or whipped cream for extra indulgence.