Sourdough French Toast Casserole

This Sourdough French Toast Casserole is a rich and comforting breakfast bake made with tangy sourdough bread, creamy custard, and warm cinnamon flavor. Perfect for holidays or weekend brunch, it’s easy to prep ahead and feeds a crowd!

If you’re looking for a comforting breakfast that’s both easy to make and irresistibly delicious, this golden-baked Sourdough French Toast Casserole is just the thing!

Made with thick cubes of tangy sourdough bread soaked in a rich cinnamon-vanilla custard, it bakes up beautifully with a crisp top and soft, custardy center. Whether you’re feeding a crowd for brunch or prepping breakfast ahead for a holiday morning, this cozy casserole is sure to impress.

Why You Will Love This Recipe!

• Tangy and Rich Flavor: Sourdough adds a delicious depth you won’t get from regular bread.
• Perfect for Make-Ahead: Assemble the night before and bake fresh in the morning.
• Crispy Top, Soft Center: Golden-baked on top with a creamy, custard-like middle.
• Ideal for Brunch or Holidays: Feeds a crowd and feels special with minimal effort.
• Customizable: Add fruit, nuts, or a streusel topping for your own twist.

Ingredients Needed

• Sourdough bread – Tangy, hearty bread that holds custard perfectly.
• Eggs – Rich base that creates a creamy custard.
• Whole milk – Adds creaminess and moisture to the casserole.
• Heavy cream – Makes the custard extra rich and indulgent.
• Granulated sugar – Sweetens the dish without overpowering it.
• Vanilla extract – Adds warm, comforting flavor throughout the bake.
• Ground cinnamon – Classic spice that pairs perfectly with sourdough.
• Salt – Enhances all the sweet, rich flavors.
• Buter – Adds richness and helps toast the top.

How To Make Sourdough French Toast Casserole

Prepare the Baking Dish: Grease a 9×13-inch baking dish with butter or nonstick spray.

Add the Bread: Place the sourdough bread cubes evenly in the prepared dish.

Make the Custard: In a large mixing bowl, whisk together the eggs, milk, cream, sugar, vanilla extract, cinnamon, and salt until fully combined.

Pour Over Bread: Slowly pour the custard mixture over the bread, pressing down gently so all the bread soaks up the liquid.

Rest or Chill: Cover the dish and refrigerate for at least 30 minutes, or overnight for best results.

Bake: Preheat your oven to 350°F (175°C). Uncover the dish and drizzle the melted butter over the top. Bake for 45–50 minutes, or until golden brown and the center is set.

Cool and Serve: Let rest for 5–10 minutes before serving. Add powdered sugar, syrup, or fruit if desired.

Sourdough French Toast Casserole Recipe Tips

• Air Use day-old or slightly stale sourdough: It soaks up the custard without turning soggy—perfect texture every time.
• Cut bread into uniform cubes: Even pieces ensure consistent baking and a balanced bite.
• Soak overnight for maximum flavor: Letting the bread absorb the custard overnight gives the casserole rich, deep flavor.
• Cover with foil if browning too fast: If the top gets too golden before the center sets, loosely cover with foil for the last 15 minutes.
• Add a crunchy topping: A simple streusel (butter, brown sugar, flour, cinnamon) adds bakery-style texture and flavor.
• Customize with mix-ins: Add berries, sliced bananas, chopped nuts, or even chocolate chips before baking.
• Let it rest before slicing: Resting 5–10 minutes after baking helps it set and slice cleanly.

How To Store Leftovers

Refrigerate: Let the casserole cool completely, then cover the dish tightly with foil or transfer slices to an airtight container. Store in the refrigerator for up to 4 days.

Freeze: Wrap individual portions or the full casserole tightly in plastic wrap and then foil, or store in a freezer-safe container. Freeze for up to 2 months. For best texture, thaw overnight in the refrigerator before reheating.

Reheat: Microwave: Heat individual portions for 1–2 minutes until warmed through. Oven: Reheat at 325°F for 10–15 minutes covered, or until heated through. Air Fryer: Reheat a slice at 320°F for 4–6 minutes for a slightly crisp top.

Sourdough French Toast Casserole Recipe Faqs

Can I use fresh sourdough bread? You can, but day-old or slightly stale sourdough works best—it absorbs the custard better without getting mushy.

Can I make this casserole ahead of time? Yes! Assemble it the night before and refrigerate overnight. Just bake it fresh in the morning.

Can I freeze this casserole? Absolutely. Freeze fully baked and cooled portions for up to 2 months. Thaw in the fridge overnight and reheat before serving.

How do I know when it’s fully baked? The casserole should be golden on top and not jiggly in the center. A knife inserted should come out mostly clean.

What can I serve with it? It pairs perfectly with fresh fruit, bacon, sausage, or a drizzle of maple syrup.

Can I use dairy alternatives? Yes! Use almond, oat, or soy milk, and swap heavy cream with coconut cream or a dairy-free alternative.

Can I make this gluten-free? Definitely—just use gluten-free sourdough bread or your favorite GF bread that holds up to soaking.

More Easy Breakfast Recipes

• AIR FRYER CINNAMON ROLL MONKEY BREAD
• AIR FRYER CAPTAIN CRUNCH FRENCH TOAST
• AIR FRYER SIMPLY POTATOES

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