Overnight French Toast Casserole
Overnight French toast casserole with brioche, cinnamon custard, and a brown-sugar streusel—bake-in-the-morning brunch that serves a crowd. Eggs are fully baked to a safe set, so it’s family-friendly and make-ahead perfect for holidays.
đź›’Ingredients
- 1 (14–16 ounce) loaf brioche or challah, cut into 1-inch cubes (about 10 cups)
- 8 large eggs
- 2 cups whole milk
- 1/2 cup heavy cream
- 1/2 cup granulated sugar
- 2 teaspoons vanilla extract
- 1 1/2 teaspoons ground cinnamon
- 1/4 teaspoon ground nutmeg
- 1/2 teaspoon kosher salt
- Streusel: 1/2 cup flour, 1/2 cup packed brown sugar, 1 teaspoon cinnamon, 1/4 cup cold butter cubed
- Maple syrup for serving
🔧Kitchen Tools Needed
- 9Ă—13-inch baking dish
- Mixing bowls
- Whisk
- Instant-read thermometer
đź“ťInstructions
- 1
Grease a 9Ă—13-inch baking dish. Spread bread cubes evenly.
- 2
Whisk eggs, milk, cream, sugar, vanilla, cinnamon, nutmeg, and salt until smooth. Pour over bread. Press down so cubes soak evenly. Cover and refrigerate at least 4 hours or overnight.
- 3
In the morning, preheat oven to 350°F. Mix streusel ingredients with fingers until crumbly; sprinkle over the casserole.
- 4
Bake uncovered 45–55 minutes until puffed, golden, and the custard is fully set (center should reach at least 160°F; no liquid egg in the middle).
- 5
Rest 10 minutes. Serve with maple syrup. Refrigerate leftovers within 2 hours; reheat to 165°F.
🥗Nutrition Information
⚡Calories per serving: 430
🏷️Recipe Tags
âť“Frequently Asked Questions
Best bread?
Day-old brioche or challah soaks custard without turning to mush.
Can I skip overnight?
Soak at least 30–45 minutes at room temp; overnight gives the best texture.
Is the egg safe?
Yes—bake until the center custard hits at least 160°F and looks set.
Dairy-free?
Use full-fat oat milk and skip cream; texture will be slightly less rich.
Add fruit?
Scatter blueberries or sliced strawberries over the top before the streusel.
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