This french toast casserole with sourdough bread recipe has been a cherished tradition in my family for decades. Growing up, Sunday mornings meant the warm, comforting aroma of cinnamon and vanilla drifting from the kitchen. My mother, always mindful of waste, turned leftover sourdough into a dreamy baked breakfast casserole that fed a crowd. Over the years, I’ve added my own spin, refining the custard to be rich yet light, ensuring that each bite is custardy, crispy, and full of love. If you’re a fan of make-ahead brunches or soul-warming holiday breakfasts, this french toast casserole with sourdough bread is the recipe to bookmark.
Why It Works
There are several reasons why this french toast casserole with sourdough bread stands out as a brunch essential:
- Sourdough soaks up custard beautifully without becoming soggy or mushy.
- It’s make-ahead friendly perfect for holidays or feeding a crowd.
- Baking instead of pan-frying allows for hands-off cooking.
- The crisp top and custardy center create an ideal texture combo.
- You can customize flavors easily with add-ins like berries, nuts, or chocolate chips.
For more flavor inspiration, don’t miss this Sourdough French Toast: A Delicious Twist on a Classic Breakfast.
Ingredients List
1 loaf sourdough bread, cut into 1-inch cubes (about 8 cups)
6 large eggs
2 cups whole milk
1/2 cup heavy cream
1/2 cup granulated sugar
1/4 cup brown sugar
1 tablespoon vanilla extract
1 teaspoon ground cinnamon
1/4 teaspoon nutmeg
1/4 teaspoon salt
Butter for greasing
Optional toppings: powdered sugar, maple syrup, fresh berries
How to Make French Toast Casserole with Sourdough Bread
Step 1: Prep the Bread
Cut your sourdough into 1-inch cubes. Let it sit out overnight or toast lightly in the oven at 300°F (150°C) for 10–15 minutes to dry it out slightly. This helps it soak the custard without falling apart.
Step 2: Make the Custard
In a large bowl, whisk together eggs, milk, cream, granulated sugar, brown sugar, vanilla, cinnamon, nutmeg, and salt until fully combined.
Step 3: Assemble the Casserole
Grease a 9×13-inch baking dish with butter. Spread the bread cubes evenly in the dish. Pour the custard over the bread, pressing down lightly to ensure every piece is soaked. Cover and refrigerate for at least 4 hours or overnight.
Step 4: Bake
Preheat your oven to 350°F (175°C). Remove the casserole from the fridge while the oven heats. Bake uncovered for 45–50 minutes or until the center is set and the top is golden brown.
Step 5: Serve
Let the casserole rest for 10 minutes before slicing. Serve warm with maple syrup, powdered sugar, or fresh fruit.
For another spin on this dish, explore The Ultimate Sourdough French Toast Recipe.
Serving & Garnish
Serve this french toast casserole with sourdough bread family-style for brunch. It pairs beautifully with:
- A dollop of whipped cream
- Maple syrup or fruit compote
- Fresh berries like blueberries or raspberries
- A dusting of powdered sugar
- A sprinkle of chopped pecans or walnuts
Common Mistakes to Avoid
Even a simple recipe like this french toast casserole with sourdough bread can go sideways without a few key reminders:
- Using fresh bread: It won’t absorb custard properly. Slightly stale or toasted is best.
- Skipping the chill time: Letting the casserole rest allows full custard absorption.
- Underbaking: The center should be set; a jiggle test will help you gauge doneness.
- Overloading with add-ins: Keep it balanced to avoid soggy spots.
Looking for more tips on bread choice? Check out Why Sourdough Bread Makes the Best Toast.
Storage & Reheating
One of the best things about this french toast casserole with sourdough bread is how well it stores and reheats.
To Store:
Cool completely, then cover with foil or transfer to an airtight container. Refrigerate for up to 4 days.
To Freeze:
Wrap individual slices or the whole casserole tightly with plastic wrap and foil. Freeze for up to 2 months.
To Reheat:
Oven: Bake at 325°F for 15–20 minutes.
Microwave: Heat individual slices for 1–2 minutes.
Rita’s Note
This recipe is perfect for holiday mornings when you want to impress with minimal morning effort. I always make this french toast casserole with sourdough bread the night before Christmas or Easter. It’s warm, cozy, and feels like a hug in casserole form. If you’re hosting a brunch, make two it disappears fast!
Want to try something playful for dessert? You’ll love this Decadent Slutty Brownies Recipe.
FAQs
Can I use a different type of bread?
Yes! Brioche, challah, or even French bread works but sourdough gives the best texture and tang.
Can I make it dairy-free?
Use almond or oat milk and coconut cream, plus plant-based butter. It will still taste rich and custardy.
Can I bake it immediately?
You can, but the texture won’t be as custard-like. Overnight soaking is ideal.
How do I prevent soggy bottom?
Toast your bread beforehand and don’t skip the chill time.
Can I add fruit or chocolate chips?
Absolutely. Blueberries, raspberries, bananas, or dark chocolate chips work wonderfully.
Happy cooking with Rita chef ❤️!