French toast casserole custard is a baked breakfast dish where thick slices of bread soak in a rich mixture of eggs, milk, cream, and warm spices, then bake until puffed and golden. It delivers all the cozy flavor of classic stovetop French toast without standing over a skillet, making it ideal for holidays, brunch gatherings, or lazy weekends. The custard-soaked bread turns soft and tender in the center with beautifully caramelized edges, and it can be assembled the night before for a stress-free morning.
Ingredients
- 1 large loaf (about 16 oz / 450 g) brioche, challah, or French bread, cut into 1-inch (2.5 cm) cubes (about 10 cups)
- 8 large eggs
- 2 cups (480 ml) whole milk
- 1 cup (240 ml) heavy cream
- 3/4 cup (150 g) granulated sugar
- 2 teaspoons vanilla extract
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg
- 1/4 teaspoon salt
- 2 tablespoons (28 g) unsalted butter, melted, for greasing the dish
For the topping (optional but recommended)
- 1/4 cup (50 g) brown sugar, packed
- 1/2 teaspoon ground cinnamon
- 2 tablespoons (28 g) cold unsalted butter, cut into small pieces
Instructions
- Prep the bread: Cut the bread into 1-inch (2.5 cm) cubes. If the bread is very fresh, spread the cubes on a baking sheet and let them sit out for 1–2 hours to dry slightly; this helps them absorb the custard without turning mushy. (If using day-old bread, skip this step.)
- Make the custard: In a large bowl, whisk together the eggs, milk, heavy cream, granulated sugar, vanilla, cinnamon, nutmeg, and salt until the sugar is dissolved and the mixture is smooth.
- Combine bread and custard: Place the bread cubes in a large bowl (or directly in the greased baking dish). Pour the custard over the bread and gently toss with your hands or a spatula so every cube is coated. Let the mixture sit for 10 minutes, tossing occasionally, so the bread absorbs the liquid.
- Assemble the casserole: Grease a 9×13-inch (23×33 cm) baking dish with the melted butter. Transfer the bread mixture to the dish and spread it into an even layer. If using the topping, mix the brown sugar and cinnamon in a small bowl, then sprinkle over the top. Dot with the cold butter pieces.
- Chill (optional but recommended): Cover the dish with plastic wrap or foil and refrigerate for at least 4 hours, or overnight (up to 12 hours). This allows the bread to fully soak up the custard, resulting in a creamier texture. If you’re short on time, you can bake immediately, but the texture will be slightly less custardy.
- Preheat and bake: When ready to bake, preheat your oven to 350°F (175°C). Remove the casserole from the refrigerator and let it sit on the counter for 20–30 minutes while the oven heats. Bake uncovered for 45–55 minutes, or until the top is golden brown and the center is set (a knife inserted in the middle should come out clean, or the internal temperature reaches 160°F (71°C), the USDA FSIS safe minimum for egg dishes). If the top starts browning too quickly, loosely cover with foil.
- Rest and serve: Let the casserole rest for 10 minutes before slicing. This allows the custard to set further, making it easier to serve. Serve warm, dusted with powdered sugar or drizzled with maple syrup.
Tips
- Bread choice matters: Brioche, challah, or French bread are ideal because they are sturdy enough to hold the custard without disintegrating. Avoid soft sandwich bread, which turns mushy.
- Don’t skip the resting time: If you can, let the assembled casserole sit in the fridge for at least 4 hours (or overnight). This step is what makes the texture custardy and rich. If you bake right away, the bread may be dry in spots and the custard may not set evenly.
- Check for doneness: The center should be just set—not jiggly. An instant-read thermometer inserted into the center should read 160°F (71°C). If it’s not there yet, bake for another 5–10 minutes.
- Make it dairy-free: Substitute the whole milk with almond or oat milk and the heavy cream with full-fat coconut cream. Use a plant-based butter for greasing. The texture will be slightly less rich but still delicious.
Serving Suggestions
Serve the casserole warm with a generous drizzle of pure maple syrup, a dusting of powdered sugar, and a pat of butter. Fresh berries (strawberries, blueberries, or raspberries) add a bright, tart contrast to the sweet custard. For a savory balance, add crispy bacon or breakfast sausage on the side. A dollop of whipped cream or a spoonful of vanilla yogurt also works beautifully.
Variations
- Apple Cinnamon: Sauté 2 peeled, diced apples in 1 tablespoon butter with 1 teaspoon cinnamon until soft, then fold into the bread mixture before baking.
- Chocolate Hazelnut: Spread a thin layer of chocolate-hazelnut spread between the bread cubes before adding the custard, or swirl it into the custard.
- Savory: Omit the sugar, cinnamon, and nutmeg. Add 1 cup shredded Gruyère or cheddar cheese, 1/4 cup chopped chives, and 1/2 teaspoon black pepper to the custard. Serve with a side of greens.
- Pumpkin Spice: Replace the granulated sugar with 1/2 cup (100 g) brown sugar and add 1/2 cup (120 g) pumpkin purée and 1 teaspoon pumpkin pie spice to the custard.
Storage and Reheating
Refrigerate: Store leftovers in an airtight container in the refrigerator for up to 3 days. The casserole will keep its texture well.
Freeze: You can freeze the baked casserole for up to 2 months. Wrap individual portions or the whole casserole tightly in plastic wrap and then foil. Thaw overnight in the refrigerator before reheating.
Reheat: The best way to reheat is in the oven. Preheat to 350°F (175°C), place the casserole in an oven-safe dish, cover with foil, and heat for 15–20 minutes (or until warmed through). For a quicker option, microwave individual slices for 30–60 seconds, though the edges will lose some crispness.
Frequently Asked Questions
Can I make this casserole without the overnight rest? Yes, you can bake it immediately after assembling, but the texture will be less custardy and the bread may be dry in spots. The resting time allows the bread to fully absorb the liquid, so if you can wait even 30 minutes, it’s better.
What’s the best bread to use? Brioche, challah, or a crusty French loaf work best. They have enough structure to hold up to the custard. Avoid pre-sliced sandwich bread, which will turn to mush.
How do I know when it’s done? The center should be set and not jiggly. Insert a knife into the center—if it comes out clean, it’s done. You can also use an instant-read thermometer; it should read 160°F (71°C), the safe minimum for egg dishes.
Can I use half-and-half instead of heavy cream? Yes, you can substitute half-and-half for the heavy cream, or even use all whole milk. The casserole will be slightly less rich but still delicious.
Why is my casserole soggy on the bottom? This usually happens if the bread is too soft or if the custard is too much for the bread. Use a sturdy bread and make sure you don’t over-soak it. Also, baking at a slightly higher temperature (375°F / 190°C) for the first 10 minutes can help create a firmer bottom.
Can I add a streusel topping? Absolutely. A simple streusel of 1/2 cup flour, 1/2 cup brown sugar, 1/2 teaspoon cinnamon, and 4 tablespoons cold butter, cut in until crumbly, can be sprinkled over the top before baking. It adds a lovely crunch.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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