Name: Overnight French Toast Casserole
Prep time: 15 min
Cook time: 50 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 1 loaf thick-cut bread (brioche, challah, or French), cut into 1-inch cubes; 8 large eggs; 2 cups whole milk or half-and-half; 1/2 cup heavy cream (optional); 1/4 cup granulated sugar; 1/4 cup brown sugar; 2 tsp vanilla extract; 1 tsp ground cinnamon; 1/4 tsp ground nutmeg; 1/4 tsp salt; Butter, for greasing the dish; Optional Topping:; 1/4 cup brown sugar; 1/4 cup all-purpose flour; 1/2 tsp cinnamon; 4 tbsp cold butter, cubed; Optional Toppings for Serving: powdered sugar, maple syrup, fresh berries, whipped cream

Why You’ll Love This Recipe

This dish takes the hassle out of morning prep. With everything assembled the night before, all you have to do is pop it in the oven in the morning. It’s warm, comforting, and just sweet enough. Whether you’re hosting brunch, enjoying a holiday breakfast, or just want a cozy weekend treat, this make-ahead casserole is a guaranteed hit. You can serve it as-is or dress it up with syrup, fruit, or whipped cream.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Thick-cut bread (like brioche, challah, or French bread)
Eggs
Whole milk or half-and-half
Heavy cream (optional for extra richness)
Granulated sugar
Brown sugar
Vanilla extract
Ground cinnamon
Ground nutmeg
Salt
Butter (for greasing the dish and for the topping)
Optional toppings: powdered sugar, maple syrup, fresh berries, whipped cream

Directions

Grease a 9×13-inch baking dish with butter. Cut bread into 1-inch cubes and layer them evenly in the dish.
In a large mixing bowl, whisk together eggs, milk, heavy cream (if using), granulated sugar, brown sugar, vanilla extract, cinnamon, nutmeg, and a pinch of salt.
Pour the custard mixture evenly over the bread cubes, pressing gently to ensure the bread soaks up the liquid.
Cover the dish with foil or plastic wrap and refrigerate overnight (or at least 6 hours).
In the morning, preheat the oven to 350°F (175°C).
Remove the casserole from the fridge and let it sit at room temperature for about 20 minutes while the oven preheats.
Optional: Prepare a simple crumble topping with butter, flour, brown sugar, and cinnamon, and sprinkle it on top.
Bake uncovered for 45–55 minutes, or until the top is golden and the center is set.
Let rest for 5–10 minutes before serving. Top with powdered sugar, syrup, or fruit if desired.

Servings and timing

This recipe serves 8 to 10 people.
Prep time: 15 minutes (plus overnight chill)
Cook time: 50 minutes
Total time: About 1 hour (plus chill time)

Variations

Add chopped pecans or walnuts for crunch.
Mix in chocolate chips or dried fruit before baking.
Use flavored bread like cinnamon swirl or raisin for extra sweetness.
Add a layer of cream cheese between bread cubes for a richer version.
Top with caramel sauce or fruit compote instead of syrup.

Storage/Reheating

Store leftovers in an airtight container in the refrigerator for up to 4 days.
To reheat, bake in the oven at 325°F until warmed through or microwave individual servings for 30–45 seconds.
You can also freeze the baked casserole in slices for up to 2 months. Thaw overnight and reheat before serving.

FAQs

Can I use regular sandwich bread?

Yes, but thicker bread like brioche or challah holds up better and results in a richer texture.

Do I have to refrigerate it overnight?

It’s best to refrigerate overnight, but a minimum of 6 hours is enough to let the bread absorb the custard.

Can I make it dairy-free?

Yes, use plant-based milk and dairy-free butter. Coconut or almond milk works well.

Can I make it gluten-free?

Absolutely—use your favorite gluten-free bread.

Should I bake it covered or uncovered?

Bake uncovered for a crispy top. If the top is browning too quickly, loosely cover it with foil.

How do I know when it’s done?

The casserole is ready when the top is golden and the center is set—not jiggly.

Can I prep this more than one night ahead?

Yes, up to 24 hours in advance. Just keep it tightly covered in the fridge.

Can I make this savory?

You can! Omit the sugar and cinnamon and add cheese, herbs, and cooked sausage or veggies.

What if I forget to chill it overnight?

Let it soak for at least 30–60 minutes at room temperature before baking. The texture may be slightly different.

Can I double the recipe?

Yes, but use two baking dishes for even cooking. Extend baking time slightly if needed.

Conclusion

Overnight French Toast Casserole is the ultimate make-ahead breakfast or brunch recipe—delicious, cozy, and easy to customize. With its soft custard center and crisp golden top, it delivers the nostalgic flavors of classic French toast with none of the morning fuss. Perfect for holidays, weekends, or anytime you want a warm, homemade meal without the morning rush.