The best brioche french toast casserole recipe soaked in a sweet oat milk and maple syrup custard and topped with a buttery cinnamon streusel. Prepare it overnight and bake it in the morning; an easy sweet breakfast for busy mornings!
Optional Topping: fresh berries, maple syrup and/or powdered sugar for topping
Instructions
Prepare (Night Before):
Lightly grease a 9x13" baking pan with nonstick spray or butter.
Add cubed brioche to the greased baking dish.
In a medium bowl, whisk together almond milk, eggs, maple syrup, vanilla extract, and cinnamon. Pour mixture over bread and use your hands to make sure all pieces of bread are saturated.
Wrap the baking dish with tin foil and let it sit in the refrigerator for at least 4 hours or overnight, if possible.
Bake (Day Of):
Once ready, preheat the oven to 350°F.
Make the streusel topping by adding all the ingredients to a small mixing bowl. Use two knives or your hands to “cut” the cubed butter into the flour. It should be crumbly.
Once the oven is heated, remove the tin foil, evenly sprinkle the streusel on top of the casserole, and bake for 40 - 50 minutes, until the top is golden brown. If browning too fast, add tin foil back on top during the last 15 minutes. Remove from oven and let cool for 5 minutes.
Sprinkle with powdered sugar, if desired, and serve with fresh berries. Enjoy!
Notes
MUST soak in the fridge for at least 4 hours. Overnight is best! Oat Milk: I recommend oat milk because it is creamy, but almond milk works too! Can be substituted with whole cow's milk, 2% milk, or cashew milk.* Cut the brioche bread into 1-inch cubes: nothing smaller, or the casserole can get mushy.Customize the flavor: feel free to experiment with flavor variations. You can add a handful of chocolate chips, raisins, or diced apples to the bread cubes for added flavor and texture. Just be mindful not to overcrowd the casserole with mix-ins.Storing: For best results, cover the baking dish with aluminum foil or place leftovers in airtight containers in the fridge for up to 3 days.Reheating: Reheat in the oven for best results at 350°F for 8 - 10 minutes (until warm) or in the microwave for 30 - 90 seconds. The oven method is better.