I make this Traditional French Toast Casserole whenever I want a no-fuss brunch that feeds a crowd and tastes like a warm bakery. Cubes of brioche or challah soak in a sweet custard, bake to a golden top, and slice into squares everyone fights over. If you love soft, custardy interiors with crisp edges, this is the recipe you’ll reach for again and again. For a playful, sticky-sweet alternate, see how the technique translates to smaller, hand-held portions with these cinnamon roll French toast bites at cinnamon roll French toast bites.
Why you’ll love this dish
This casserole hits the sweet spot between simplicity and comfort. It turns day-old bread into something luxurious without complicated steps or specialty equipment. It’s great for family mornings, potlucks, and busy holiday breakfasts where you want a make-ahead main that still tastes freshly baked.
“Easy to assemble the night before, feeds a crowd, and everyone asks for the recipe. The top gets golden and crisp while the inside stays lusciously soft.”
Reasons to make it now: it’s kid approved, budget friendly if you rescue stale loaves, and forgiving — small timing or bread swaps won’t ruin the result.
Step-by-step overview
You’ll cube the bread, whisk a simple egg-and-milk custard, pour it over the bread so it soaks through, dot with melted butter, then bake until puffed and set. Optionally, refrigerate overnight to deepen flavor and make morning service stress free. Total active time is about 20 minutes; bake about 40 minutes.
What you’ll need
- 1 loaf brioche, challah, or French bread, cut into 1-inch cubes (stale is fine)
- 6 large eggs
- 2 cups whole milk (or half-and-half for richer custard)
- 1/2 cup granulated sugar (swap for brown sugar for a deeper flavor)
- 1 tablespoon vanilla extract
- 1 teaspoon ground cinnamon
- 1/4 teaspoon salt
- 1/2 cup unsalted butter, melted
Notes: Use sturdy bread so cubes keep shape after soaking. For a lighter version use 2% milk; for dairy-free, see Variations below.
Step-by-step instructions
- Preheat the oven to 350°F.
- Grease a 9×13-inch baking dish with butter or nonstick spray.
- Spread the bread cubes in an even layer in the dish. Try to keep pieces similar in size so they bake uniformly.
- In a large bowl, whisk eggs, milk, sugar, vanilla, cinnamon, and salt until completely smooth.
- Pour the custard over the bread. Press the bread gently so it absorbs the liquid, working to get the puddles soaked in.
- Drizzle the melted butter over the top in an even layer; the butter helps the top brown and adds richness.
- Let the dish sit for 10 minutes to soak. For make-ahead, cover and refrigerate up to overnight so the custard fully penetrates the bread.
- Bake uncovered for about 40 minutes, or until the top is golden and the center is set. A knife inserted in the middle should come out mostly clean. Let cool briefly before slicing. Serve warm with maple syrup, powdered sugar, or fresh fruit.
Best ways to enjoy it
Serve squares hot from the oven with a drizzle of pure maple syrup and a dusting of powdered sugar. Fresh berries, sliced bananas, or a dollop of whipped cream add bright contrast. For a crunchy element, sprinkle toasted pecans or sliced almonds on top just before serving.
If you want bite-sized fun for a party, try the cinnamon-roll style version and small-format presentation found at a cinnamon-roll twist on French toast.
Storage and reheating tips
Cool the casserole to room temperature, then refrigerate in an airtight container for up to 3 to 4 days. To reheat, warm individual slices in a 350°F oven for 8 to 12 minutes or microwave a slice for 30 to 60 seconds until heated through. To freeze, wrap cooled portions tightly in plastic wrap and foil, then freeze up to 2 months. Thaw in the refrigerator overnight and reheat in the oven for best texture.
Food safety note: egg-based casseroles should be refrigerated within two hours of baking. Reheat leftovers to at least 165°F before serving.
Helpful cooking tips
- Use slightly stale bread for the best custard absorption; fresh bread can become mushy. If only fresh bread is available, cube it and leave it on a sheet tray uncovered for a few hours.
- Cut bread into uniform 1-inch cubes so pieces cook evenly.
- Press the bread gently after pouring the custard to encourage full soaking.
- If the top browns too quickly while the center is still soft, tent loosely with foil and continue baking.
- For an especially custardy center, use half-and-half or add a splash of heavy cream, but watch for over-browning.
- Check doneness with a knife in the middle; it should come out mostly clean and the center should register about 160°F.
- For an overnight soak, bring the casserole to room temperature for 20 minutes before baking to avoid a long, cold-to-hot oven time.
Recipe variations
- Fruit-studded: Fold in 1 to 1 1/2 cups fresh or frozen berries before pouring custard. Thaw and drain frozen fruit first.
- Streusel top: Mix 1/2 cup flour, 1/3 cup brown sugar, 1/4 cup cold butter, and a pinch of cinnamon; sprinkle on top before baking for a crunchy finish.
- Nutty twist: Stir chopped walnuts or pecans into the custard or scatter on top midway through baking.
- Dairy-free: Use unsweetened soy or oat milk and substitute 1/2 cup melted coconut oil for butter. Texture will be slightly different but still satisfying.
- Gluten-free: Use a firm gluten-free loaf and follow the same soak and bake times; texture depends on the bread’s structure.
FAQ
How long does prep and total time take?
Active prep is about 15 to 20 minutes. If you let the casserole soak for 10 minutes before baking, add about 40 minutes bake time. For overnight soak, prep the night before and bake 40 minutes the next morning.
Can I assemble this the night before?
Yes. After pouring the custard and drizzling the butter, cover the dish and refrigerate up to overnight. Bake from cold; you may need an extra 5 to 10 minutes of bake time.
Can I use stale or fresh bread?
Stale or day-old bread is preferred because it soaks up custard without collapsing. Fresh bread will work if you let cubes dry on a tray for a few hours first.
How can I tell when it is fully cooked?
The top should be golden and firm. Insert a knife in the center; it should come out mostly clean. For precision, an instant-read thermometer should read about 160°F in the center.
Is it safe to reheat and freeze leftovers?
Yes. Refrigerate within two hours and consume within 3 to 4 days. Freeze portions up to 2 months. Reheat to 165°F before serving.
Traditional French Toast Casserole
Ingredients
Method
- Preheat the oven to 350°F.
- Grease a 9x13-inch baking dish with butter or nonstick spray.
- Spread the bread cubes in an even layer in the dish, ensuring uniform size for even baking.
- In a large bowl, whisk the eggs, milk, sugar, vanilla, cinnamon, and salt until completely smooth.
- Pour the custard over the bread and gently press the bread to absorb the liquid.
- Drizzle the melted butter over the top in an even layer.
- Let the dish sit for 10 minutes to soak or cover and refrigerate overnight.
- Bake uncovered for about 40 minutes, or until the top is golden and the center is set.
- Let cool briefly before slicing and serve warm with maple syrup, powdered sugar, or fresh fruit.
