Sourdough french toast casserole is one of those breakfasts that checks all the boxes—it’s indulgent, crowd-pleasing, easy to prep ahead, and transforms your day-old sourdough bread into a sweet, custardy masterpiece. Enjoy it fresh from the oven as a delightful brunch centerpiece, or reheat the leftovers to savor that irresistible tang all over again. Whether you prefer classic toppings like powdered sugar and maple syrup or love jazzing things up with caramelized fruits and drizzles of icing, you’ll fall in love with how sourdough french toast casserole can bring a cozy warmth to your mornings.

Table of Contents

Sourdough french toast casserole is a simple yet impressive breakfast bake where tangy sourdough bread soaks up a sweet egg custard, then bakes to a golden perfection. You can customize it with fruits, spices, or extra toppings, and it’s perfect for feeding a group without slaving over the stove. Make it the night before, and you’ll have a decadent meal ready in the morning with minimal effort.

Introduction

You wake up on a lazy weekend morning, craving something that’s both comforting and satisfying. Maybe you’ve got leftover sourdough on the counter, and the thought of throwing it away breaks your heart—especially if you worked hard to make it or spent good money at the bakery. Enter the glorious invention that is sourdough french toast casserole. This delightful dish captures the tangy flavor of sourdough bread and pairs it with a luxurious custard, all topped off with a golden-brown finish that practically begs to be drizzled with syrup or dusted with powdered sugar.

Who says you have to decide between sweet and savory when you can have the perfect balance of sweet, tangy, and just a hint of saltiness? With this casserole, you’ll get all those comforting breakfast vibes without flipping individual slices of bread over a skillet. Your only real challenge will be finding enough self-control not to devour the entire pan in one sitting!

In this article, you’ll learn every trick in the book to ensure your sourdough french toast casserole turns out perfect every time. We’ll talk about ingredients, preparation tips, add-on ideas, and even some make-ahead strategies that simplify your mornings. So let’s roll up our sleeves and dive into a world of cinnamon-sweet aromas, crusty sourdough edges, and an ooey-gooey custard center that’s impossible to resist.

Why You’ll Love This Recipe

Great for Crowds
Need a breakfast or brunch dish that can feed the entire soccer team? Look no further than sourdough french toast casserole. You can bake one large dish to satisfy a horde of hungry guests without spending an hour manning the stovetop.
Fabulous Way to Use Stale Bread
Don’t let that slightly dried-out sourdough loaf go to waste! This casserole thrives on bread that’s lost a bit of its moisture because it absorbs the custard more effectively.
Make-Ahead Convenience
You can prep everything the night before. In the morning, simply pop your sourdough french toast casserole into the oven and let the magic happen.
Versatile Flavor Options
Keep it simple or layer in sautéed apples, chocolate chips, fresh berries, or even pieces of crispy bacon. Whichever route you choose, the tang of sourdough always shines through.
Perfectly Tangy and Sweet
The slight tang from the sourdough bread acts as a wonderful contrast to the sweet custard, syrup, and toppings. It’s a balance that will have everyone coming back for seconds.

Tools You Might Need

Baking Dish (9×13 or equivalent): Your sourdough french toast casserole needs a roomy dish to bake evenly.
Mixing Bowl: A large bowl to whisk eggs, milk, and other custard ingredients.
Measuring cups and spoons provide precise portions that ensure a consistent taste and texture.
Whisk: For mixing the custard until smooth.
Knife & Cutting Board: To cube or slice your sourdough loaf as you prefer.

If you decide to experiment with specialized recipes—such as a pink salt gluten-free bread spin found in resources like this pink salt gluten-free bread recipe—you might adapt some steps, but the overall process remains largely the same.

Ingredients for Sourdough French Toast Casserole

Below is a general overview of the ingredients you’ll need:

Sourdough Bread (about 1 loaf)
- Day-old sourdough is ideal.
Eggs (6–8, depending on loaf size)
- They form the base of your custard mixture.
Milk (2–3 cups)
- Use whole milk for extra creaminess, or opt for a dairy alternative.
Sugar or Sweetener (⅓–½ cup)
- Brown sugar adds a deeper flavor, but regular granulated sugar works fine.
Vanilla Extract (1–2 teaspoons)
- Enhances the dessert-like qualities of your sourdough french toast casserole.
Cinnamon (1 teaspoon)
- For that warm, aromatic touch.
Salt (¼ teaspoon)
- Balances sweetness and highlights sourdough’s tang.
Optional Add-Ins:
- Fresh berries, sliced apples, raisins, chocolate chips, or nuts.
Streusel Topping (optional but highly recommended)
- Typically a mix of flour, brown sugar, cinnamon, and cold butter.
- Add a sweet, crunchy layer on top.

How to Make Sourdough French Toast Casserole

Sourdough French Toast Casserole

Print Recipe

This sourdough french toast casserole is the ultimate comfort food for a lazy weekend morning. Made with tangy sourdough bread, a rich custard, and optional add-ins like berries or chocolate chips, this recipe is perfect for breakfast, brunch, or even dessert! Top it with maple syrup or powdered sugar for a truly irresistible treat.

Total Time: PT1H
Yield: 6–8 servings

Ingredients

- Sourdough Bread (about 1 loaf)

- Eggs (6–8, depending on loaf size)

- Milk (2–3 cups)

- Sugar or Sweetener (⅓–½ cup)

- Vanilla Extract (1–2 teaspoons)
- Cinnamon (1 teaspoon)

- Salt (¼ teaspoon)

- Optional Add-Ins:

- Streusel Topping (optional but highly recommended)

Vanilla Extract (1–2 teaspoons)
Cinnamon (1 teaspoon)

Salt (¼ teaspoon)

Optional Add-Ins:

Streusel Topping (optional but highly recommended)