This gluten-free French toast casserole transforms sturdy gluten-free bread into a soft, custardy, golden-baked breakfast that feeds a crowd with minimal fuss. It works because the bread soaks up a rich egg-and-milk custard overnight, so the next morning you just bake it until puffed and set. The result is a forgiving, make-ahead dish that delivers all the cozy cinnamon-vanilla flavor of classic French toast without the need to stand at the stove flipping slices.
Ingredients
- 1 loaf (about 16 oz / 450 g) gluten-free sandwich bread, preferably day-old, cut into 1-inch cubes
- 8 large eggs
- 2 cups (480 ml) whole milk or unsweetened dairy-free milk (e.g., almond, oat, or coconut)
- 1/2 cup (120 ml) heavy cream (optional, for extra richness)
- 1/2 cup (100 g) granulated sugar
- 2 teaspoons vanilla extract
- 1 1/2 teaspoons ground cinnamon
- 1/4 teaspoon ground nutmeg
- 1/4 teaspoon salt
- For the topping: 2 tablespoons (28 g) unsalted butter, melted, plus 1 tablespoon (15 g) cold butter, cut into small pieces
- For serving: maple syrup, fresh berries, powdered sugar (optional)
Instructions
- Lightly grease a 9×13-inch (23×33 cm) baking dish with butter or nonstick spray.
- Place the bread cubes in the prepared dish, spreading them evenly.
- In a large bowl, whisk together the eggs, milk, cream (if using), sugar, vanilla, cinnamon, nutmeg, and salt until fully combined and slightly frothy.
- Pour the custard evenly over the bread cubes. Gently press the bread down with a spatula so all pieces are soaked.
- Cover the dish tightly with plastic wrap or foil and refrigerate for at least 6 hours, or overnight (up to 24 hours).
- When ready to bake, remove the dish from the refrigerator and let it sit at room temperature for 30 minutes while the oven preheats to 350°F (175°C).
- Drizzle the melted butter over the top, then scatter the cold butter pieces over the surface.
- Bake uncovered for 45–55 minutes, until the casserole is puffed, golden brown, and the center is set (a knife inserted into the middle should come out clean). If the top browns too quickly, loosely cover with foil.
- Let the casserole rest for 5–10 minutes before serving. Serve warm, with maple syrup and berries if desired.
Tips
- Use stale bread: Fresh gluten-free bread can turn mushy. If your bread is fresh, spread the cubes on a baking sheet and toast at 300°F (150°C) for 5–7 minutes to dry them out slightly before assembling.
- Don’t skip the soak: The overnight rest is essential for gluten-free bread – it needs time to absorb the custard without becoming gummy. If you’re short on time, soak for at least 2 hours, but the texture will be less tender.
- Check for doneness: The center should reach 160°F (71°C) (USDA FSIS safe minimum for egg dishes) when checked with a food thermometer. A knife test also works: insert a knife near the center; it should come out clean.
- Make it dairy-free: Use full-fat canned coconut milk or oat milk and replace the butter with a dairy-free alternative. The casserole will be slightly less rich but still delicious.
Serving Suggestions
Serve warm with a drizzle of pure maple syrup and a dusting of powdered sugar. Fresh berries, sliced bananas, or a spoonful of whipped cream add brightness. For a savory contrast, add a few strips of crispy bacon or turkey sausage on the side. A dollop of yogurt or a sprinkle of toasted pecans also works well.
Variations
- Berry Bliss: Fold 1 cup (150 g) fresh or frozen blueberries, raspberries, or sliced strawberries into the bread cubes before adding the custard.
- Apple Cinnamon: Sauté 2 peeled, diced apples in butter with 1 teaspoon cinnamon until soft, then layer them with the bread.
- Chocolate-Hazelnut: Spread a thin layer of chocolate-hazelnut spread on half the bread cubes before assembling, then proceed as directed.
- Pumpkin Spice: Replace the nutmeg with 1 teaspoon pumpkin pie spice and add 1/2 cup (120 g) pumpkin puree to the custard.
Storage and Reheating
Refrigerate leftovers in an airtight container for up to 4 days. To reheat, place a portion on a microwave-safe plate and heat in 30-second bursts until warmed through, or reheat in a 350°F (175°C) oven for 10–15 minutes, covered with foil to prevent drying. This casserole also freezes well: wrap tightly in plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.
Frequently Asked Questions
Can I use any gluten-free bread? Yes, but a sturdy sandwich bread works best. Avoid very airy or crumbly breads that fall apart during soaking. Gluten-free brioche or sourdough-style loaves are excellent choices.
Can I make this casserole without the overnight soak? You can, but the texture will be less custardy and more soggy. If you’re in a rush, let the casserole sit at room temperature for 30–60 minutes after pouring the custard, then bake – it will still be good, just not as set.
Why is my casserole still runny in the middle? This usually means it wasn’t baked long enough. Ovens vary, so check at 45 minutes and continue baking in 5-minute increments until a knife inserted near the center comes out clean or the internal temperature reaches 160°F (71°C).
Can I use a different milk? Absolutely. Any milk works – dairy or plant-based. For a richer custard, use whole milk or add extra cream. For a lighter version, use 2% or unsweetened almond milk.
Can I double the recipe? Yes, use a 10×15-inch (25×38 cm) baking dish or two 9×13-inch dishes. Increase the baking time by about 10–15 minutes, and check for doneness as described.
Can I add a streusel topping? Definitely. Mix 1/2 cup (60 g) gluten-free flour, 1/2 cup (100 g) brown sugar, 1 teaspoon cinnamon, and 4 tablespoons (55 g) cold butter until crumbly, then sprinkle over the casserole before baking.
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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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