Slow Cooker French Toast Casserole

Looking for some breakfast inspiration? Slow Cooker French Toast is always a home run! This make-ahead, overnight French Toast Casserole makes it easy to feed a crowd.

French Toast Casserole - slice of french toast casserole
Jessica Gavin

French toast is one of those comforting morning recipes that allows you to eat dessert for breakfast. What’s not to love about thick-cut bread soaked in vanilla custard? It’s the perfect way to transform a loaf of bread into something magical.

Easy Overnight French Toast

Save time and stress by preparing French toast casserole in the slow cooker the day before you need it. Instead of individually dipping and pan-frying each custardy slice of bread, add everything to the slow cooker, soak it overnight, then let the slow cooker work its magic in the morning!

An overnight soak gives the custard plenty of time to soak into the buttery cubes of toasted brioche. The casserole then gently cooks in the slow cooker to produce tender, pudding-like results, loaded with the warmth of cinnamon and nutmeg, with a touch of sweetness from vanilla.

Grab a bottle of maple syrup! You’ll want to dig in as soon as this casserole is ready!

French Toast Casserole - spoonful of french toast casserole
Jessica Gavin

Why Make French Toast Casserole in the Slow Cooker?

I didn’t realize how versatile a slow cooker could be until it transformed bread, egg, and cream into the most luxurious breakfast treat!

Using a slow cooker saves me time and builds a better French toast casserole. I love not having to fire up the oven, plus I can take this dish anywhere! I prepare the toasted brioche and the custard the night before, then let the slow cooker take over in the morning. This gives me a chance to enjoy my first cup of hot tea and watch cartoons with my kids.

Also, when you bake a custard, typically you want a warm and moist environment so the texture stays velvety, instead of rubbery, which can happen when custard is overcooked.

The slow cooker mimics just the right steamy environment. The eggs in the casserole cook gently over a longer period of time, allowing the creamy, spice-infused custard to bring everything together.

What’s the Best Bread for French Toast Casserole?

French brioche is my top choice for French toast. It’s a tender and rich bread made with flour, butter, eggs, and a touch of sugar.

It has a nice chew, with golden buttery crust, but yields a silky texture when it absorbs the custard. I found pre-sliced loaves at Trader Joe’s, which I then cut into cubes.

Brioche rolls, loaves, and burger buns work great as well. Challah, French bread, or even sourdough would be tasty substitutes.

How Do You Make This French Toast Casserole?

French toast casserole is easy to make. Here’s how!

  1. Toast the bread to remove the moisture, while helps it soak up more custard.
  2. Make the custard, add the bread cubes, and soak overnight in the fridge (or at least for one hour).
  3. The next day, let the slow cooker insert with the soaked bread cubes come to room temp, and then put it in the slow cooker!
  4. Get ready to devour a big slice!

As the casserole cooks, it will puff up, then deflate a bit. When done, the center should no longer be jiggly. Custards are ready to eat at 175oF.

Crockpot French Toast Casserole - slice french toast casserole on plate with syrup and fork
Jessica Gavin

How Much Time Does It Need to Cook?

French toast casserole is a wonderful dish to make on slow and laid back weekend mornings, for Sunday brunch, or when you need to serve a group buffet style.

Depending upon when you want to eat, plan for 30 minutes to take the chill off the insert before cooking. If you placed the cold insert and food in the slow cooker, it would increase the time it takes for the temperature to ramp up. Letting the pot sit briefly at room temperature helps to reduce cook time.

The casserole should be ready in about two and a half hours if cooked on the high setting. If cooked on the low setting, it should take about five hours. Your kitchen is going to smell amazing!

It’s best not to slow cook the casserole overnight—the eggs in the casserole may overcook and become rubbery in texture, instead of smooth and custardy.

A Great Make-Ahead Breakfast for the Week!

This French Toast Casserole also reheats well, so it’s a good choice if you need a make-ahead breakfast for the week. French toast casserole can be refrigerated for up to five days and then reheated in the microwave. Reheat in 30-second intervals until warmed through, about 1 1/2 to 2 minutes.

What Are Some Ways to Adapt This Recipe?

The ways to add some variety and excitement to this basic Slow Cooker French Toast Casserole are endless.

Try any of the following:

  • Top with sliced strawberries, raspberries, blueberries, or blackberries.
  • Add dried cranberries, raisins, or apples to cook with the casserole.
  • Sauté apples or peaches with brown sugar and butter, then serve on top.
  • Mix up the spices and add cardamom, cloves, ginger, or even cocoa powder.
  • Add crunch with chopped pecans, almonds, or walnuts.
  • Kids love chocolate chips on top or in the casserole
  • Make mom happy with some homemade caramel sauce drizzled over the top.

Try These Sweet or Savory Breakfast Casseroles

Slow Cooker French Toast Casserole

Prep Time 20 mins
Cook Time 3 hrs 30 mins
Bring up to room temp 30 mins
Total Time 4 hrs 20 mins
Servings 8 servings


  • 1 tablespoon unsalted butter, softened

  • 16-ounce French brioche loaf, cut into 3/4-inch cubes (12 cups)

  • 8 large eggs

  • 4 cups half and half

  • 2 tablespoons granulated sugar

  • 1 tablespoon brown sugar

  • 2 teaspoons pure vanilla extract

  • 1 1/2 teaspoons ground cinnamon

  • 1/4 teaspoon ground nutmeg

  • 1/4 teaspoon kosher salt

  • Powdered sugar, for sprinkling, optional

  • Pure maple syrup, for topping, optional


  1. Preheat the oven to 300°F.

    Set the oven rack to the center position. Grease the inside of a 6-quart slow cooker with the softened butter.

  2. Toast the bread:

    Spread the bread cubes in a single layer on a large sheet pan or two smaller pans. Bake for 20 minutes, stirring halfway through toasting. The bread should be lightly golden, dry, and crisp. Remove the bread cubes from the oven and let them cool for 10 minutes.

    Once cool, transfer toasted bread to the slow cooker and arrange in an even layer.

    French Toast Casserole Overnight Recipe - toasted bread cubes on baking sheet
    Jessica Gavin
  3. Make the custard:

    In a medium bowl, whisk the eggs. Add the half-and-half, granulated sugar, brown sugar, vanilla, cinnamon, nutmeg, and salt to the bowl with the eggs, and whisk to combine.

  4. Add the custard to the bread cubes:

    Pour the custard mixture over the bread. Press the bread into the liquid to submerge. Cover and transfer to the refrigerator for at least 60 minutes or up to 24 hours.

    Make Ahead French Toast Casserole - milk being poured over bread cubes in slow cooker
    Jessica Gavin
  5. Bring the casserole to room temperature:

    Remove the casserole from the refrigerator and bring it to room temperature for 30 minutes.

    Easy French Toast Casserole - bread, cinnamon and milk in slow cooker
    Jessica Gavin
  6. Slow cook the casserole:

    Place the slow cooker insert into the slow cooker base, cover it with a lid, and cook it on the high setting for 2 1/2 to 3 1/2 hours, or on the low setting for 4 to 5 hours.

    The casserole is ready when the custard is set in the center and puffy; it should not be runny or jiggle. It will shrink slightly once the heat is turned off. The center of the casserole should be above 175°F when tested with a thermometer.

    Overnight French Toast Casserole - bread in slow cooker
    Jessica Gavin
  7. To serve:

    Allow the casserole to rest for at least 15 minutes before serving. Serve warm, sprinkled with powdered sugar and drizzled with maple syrup.

Nutrition Facts (per serving)
450 Calories
28g Fat
34g Carbs
15g Protein
Show Full Nutrition Label Hide Full Nutrition Label
Nutrition Facts
Servings: 8
Amount per serving
Calories 450
% Daily Value*
Total Fat 28g 36%
Saturated Fat 16g 82%
Cholesterol 305mg 102%
Sodium 398mg 17%
Total Carbohydrate 34g 12%
Dietary Fiber 1g 4%
Total Sugars 14g
Protein 15g
Vitamin C 1mg 6%
Calcium 183mg 14%
Iron 2mg 13%
Potassium 293mg 6%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.