French Toast Casserole

There’s a certain magic in waking up to a breakfast that’s already prepared, filling the house with the scent of cinnamon and vanilla. My Overnight Cinnamon Streusel French Toast Casserole is that magic. I remember the first time I made it for a holiday brunch; the custardy brioche and crunchy streusel topping were an instant hit. It has the soul of classic French toast but in a simple, shareable form. It’s a standout among my breakfast bakes, much like my family’s favorite sausage and egg breakfast casserole.

What Makes This French Toast Casserole So Special?

What I adore most is the simplicity. With just 20 minutes of prep the night before, my morning is completely stress-free. The rich brioche or challah soaks up the egg custard overnight, ensuring every bite is incredibly moist and flavorful. After 50 minutes in the oven, you get a perfectly golden, puffed-up French Toast Casserole with a buttery, cinnamon-spiced streusel. It’s a truly effortless way to create a spectacular breakfast that feels both comforting and special.

Choosing the Best for Your French Toast Casserole

The bread is the star. I always use day-old brioche or challah because their richness creates a wonderfully custardy texture. For the creamiest custard, don’t skip the heavy cream! It makes all the difference in this French Toast Casserole and even in savory bakes, like my simple zucchini casserole.

Sofia

Overnight Cinnamon Streusel French Toast Casserole

A decadent, make-ahead breakfast casserole featuring custard-soaked bread cubes baked to golden perfection with a buttery cinnamon-streusel topping. The perfect effortless dish for holidays, brunches, or a special weekend morning.

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Prep Time 20 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 10 minutes mins

Servings: 8 servings

Course: Breakfast, Brunch

Cuisine: American, French

Calories: 580

Ingredients Equipment Method Notes

Ingredients

  

For the Casserole

• 1 loaf (16 oz) brioche or challah bread day-old, cut into 1-inch cubes
• 8 large eggs
• 2 cups whole milk
• 1 cup heavy cream
• 3/4 cup granulated sugar
• 2 tsp vanilla extract
• 1 tsp ground cinnamon
• 1/4 tsp ground nutmeg
• 1/4 tsp salt

For the Streusel Topping

• 1/2 cup all-purpose flour
• 1/2 cup light brown sugar packed
• 1 tsp ground cinnamon
• 1/2 cup unsalted butter cold and cut into small cubes (1 stick)

For Serving (Optional)

• Maple syrup
• Powdered sugar
• Fresh berries

Equipment

• 9x13 inch baking dish
• Large mixing bowl
• Small Mixing Bowl
• Whisk

Method

 

Prepare the Casserole (Night Before)

• Grease a 9x13-inch baking dish with butter or nonstick cooking spray. Spread the cubed bread in an even layer in the prepared dish.
• In a large mixing bowl, whisk together the large eggs, whole milk, heavy cream, granulated sugar, vanilla extract, cinnamon, nutmeg, and salt until well combined and smooth.
• Pour the custard mixture evenly over the bread cubes in the baking dish. Gently press down on the bread with a spatula to ensure all pieces are submerged and begin to absorb the liquid.
• Cover the dish tightly with plastic wrap and refrigerate for at least 8 hours, or preferably overnight. This allows the bread to fully soak up the custard.

Prepare the Streusel and Bake

• In a separate small bowl, combine the all-purpose flour, brown sugar, and cinnamon for the streusel. Add the cold, cubed butter. Using a pastry blender or your fingertips, cut the butter into the dry ingredients until the mixture resembles coarse crumbs. Cover and refrigerate separately overnight.
• When ready to bake, preheat your oven to 350°F (175°C). Remove the casserole dish from the refrigerator and let it sit at room temperature for 20-30 minutes while the oven heats up.
• Uncover the casserole and sprinkle the chilled streusel topping evenly over the surface.
• Bake uncovered for 45-55 minutes. The casserole is done when the center is set (a knife inserted into the center comes out clean) and the top is golden brown and bubbly. If the top begins to brown too quickly, you can loosely tent it with aluminum foil for the last 10-15 minutes of baking.
• Remove from the oven and let the casserole cool for at least 10-15 minutes before slicing and serving. This helps it set up properly.
• Serve warm, drizzled with maple syrup and dusted with powdered sugar. Fresh berries are also a wonderful addition.

Notes

For best results, use day-old, sturdy bread like brioche, challah, or a French baguette. Softer, fresh bread can become too soggy.
Make-Ahead: The casserole must be refrigerated for at least 8 hours, making it perfect for preparing the night before. You can also assemble and freeze the unbaked casserole for up to 2 months. Thaw overnight in the refrigerator before baking as directed.
Variations: Feel free to add 1 cup of chopped pecans or walnuts to the streusel topping for extra crunch. You can also mix in 1 cup of fresh or frozen berries with the bread cubes before adding the custard.

How I Make French Toast Casserole

My process is delightfully simple. The night before, I whisk together the eggs, milk, cream, and spices, then pour it over the cubed bread in a baking dish. I cover it and let it rest in the fridge overnight. In the morning, I just mix up the quick streusel topping, sprinkle it over the top, and bake. It’s a sweet start to the day, unlike the savory comfort of a hamburger potato casserole.

My Secrets for Success with French Toast Casserole

• Use day-old, slightly dry bread to prevent sogginess.
• Press the bread down gently to ensure it’s fully submerged in the custard.
• Let the casserole rest for 10 minutes after baking before serving.

How I Serve and Store This Dish

I love serving this French Toast Casserole warm, drizzled with pure maple syrup and a light dusting of powdered sugar. A side of fresh berries adds a wonderful brightness! To store leftovers, I cover the dish tightly and refrigerate it for up to 3 days. I find it reheats beautifully in the oven or microwave, making for an easy breakfast on busy mornings.

faq 1

Can I use a different type of bread? Absolutely! While I prefer brioche or challah for their richness, a sturdy sourdough or a thick-cut French bread works wonderfully too. The key is to use bread that is slightly stale or dry, as it will absorb the custard much better without becoming mushy in your French Toast Casserole.

faq 2

Can I bake this casserole the same day? You can, but I highly recommend the overnight soak for the best texture. If you’re short on time, let the bread soak in the custard for at least 2-4 hours in the refrigerator. This gives the bread enough time to absorb the liquid, ensuring your French Toast Casserole is moist inside.

faq 3

How do I know when the French Toast Casserole is fully cooked? The casserole is done when the center is set and no longer jiggly. A knife inserted into the middle should come out clean, without any wet, uncooked egg custard. The top should also be beautifully golden brown and puffed up. I always check it right at the 50-minute mark.

faq 4

Can I add any mix-ins to the casserole? Of course! This is a great recipe to customize. I sometimes add a handful of chopped pecans or walnuts to the streusel for extra crunch. You could also stir in some fresh blueberries or sliced bananas with the bread cubes before you pour over the custard for a fruity twist.

This breakfast casserole holds a special place in my heart, and I truly hope it brings as much joy to your table as it does to mine. If you try it, I’d absolutely love to hear what you think in the comments below!

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