Gluten-Free Cinnamon Apple French Toast Bake

Step-by-step gluten-free cinnamon apple french toast bake with caramelized apples, custard-soaked brioche, and a brown sugar crust. Make it ahead for stress-free brunch.

The first time I made a gluten-free french toast bake, I pulled a soggy, barely-set casserole out of the oven and nearly gave up on the whole idea. I had rushed the soak time and used a bargain bread that dissolved into mush the moment the egg mixture touched it.

That disaster taught me the two things that make or break this dish: a sturdy certified gluten-free brioche and caramelizing your apples before they ever touch the bread. Get those right, and your gluten-free cinnamon apple french toast bake comes out golden on top, custardy in the middle, and warmly spiced all the way through.

You know, this is one of those recipes that looks like you spent all morning in the kitchen — but you can assemble it the night before and simply bake it while the coffee brews. Does it get any better than waking up to a house that smells like cinnamon and brown sugar?

Why You’ll Love This Gluten-Free Cinnamon Apple French Toast Bake

• Texture that holds together: Gluten-free brioche absorbs the custard without turning to mush, giving you soft, pillowy layers under a lightly crisp brown sugar top.
• Make-ahead friendly: Assemble the night before and refrigerate — morning prep takes less than five minutes.
• Beginner-proof: No special equipment needed beyond a skillet, a bowl, and a 9×13 baking dish.
• Easy to adapt: Swap the milk for your favorite non-dairy alternative and it’s completely dairy-free without changing the method.

The Secret to Perfect Gluten-Free Cinnamon Apple French Toast Bake

• Start with certified gluten-free brioche: Brioche has a higher egg and fat content than standard sandwich bread, which means it soaks up the custard evenly and stays tender instead of crumbling apart in the dish.
• Pre-cook the apples: Raw apple releases too much moisture during baking, which steams the bread instead of letting it set. Cooking the apples with cinnamon and brown sugar for eight minutes concentrates their flavor and removes excess liquid before they go in the casserole.
• Press the bread down gently: After pouring the egg mixture, use the back of a spoon to press the cubes down so every piece absorbs the custard all the way through. This is the step most people skip — and it’s the reason the center comes out fully set instead of wet.
• The butter-sugar crumble on top: Combining softened butter with brown sugar and sprinkling it over the casserole creates a caramelized crust as it bakes, so you get a slightly crisp top over a soft interior — like the best parts of a cinnamon roll and a bread pudding combined.

Ingredients

Group	Ingredient	Amount	Notes
Base	Certified gluten-free brioche bread, cut into 1-inch cubes	1 loaf	Look for “certified gluten-free” on the label — not just “gluten-free friendly”
Custard	Large eggs	3
Custard	Whole milk	1½ cups	Full-fat for the richest custard; oat milk or almond milk also works
Custard	Vanilla extract	1 teaspoon
Custard	Ground nutmeg	½ teaspoon
Custard	Ground cloves	½ teaspoon
Apple Filling	Apples, peeled and diced	2	Honeycrisp or Granny Smith hold their shape best
Apple Filling	Ground cinnamon	1½ teaspoons
Apple Filling + Crumble	Brown sugar, divided	½ cup	¼ cup for the apples, ¼ cup for the crumble topping
Apple Filling + Crumble	Salted butter, divided	6 tablespoons	3 tablespoons for the skillet, 3 tablespoons softened for the topping

Instructions

Step 1: Prep the Pan and the Bread

Preheat the oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish. Cut the gluten-free brioche into bite-sized cubes and spread them evenly in the prepared dish — you want a fairly even layer so the custard soaks through consistently.

Step 2: Caramelize the Apples

Peel, core, and dice the apples into small pieces. Melt 3 tablespoons of the butter in a large skillet over medium heat, then add the diced apples and cook for about 3 minutes, stirring occasionally.

Stir in the cinnamon and ¼ cup of the brown sugar. Continue cooking for another 5 minutes, until the apples begin to soften and become lightly caramelized — you’ll notice the edges turning golden and a nutty, sweet aroma rising from the pan. Remove from the heat and set aside.

Pro Tip: Don’t rush this step. Those 8 minutes of cooking are what concentrate the apple flavor and prevent a soggy casserole.

Step 3: Make the Custard

In a large bowl, whisk together the eggs, whole milk, vanilla extract, nutmeg, and cloves until well combined. Whisk until the mixture looks fully smooth and uniform — about 60 seconds of brisk whisking does it.

Step 4: Soak the Bread

Pour the egg mixture evenly over the gluten-free brioche cubes, then gently press the bread down with the back of a spoon so it absorbs the custard. Let it sit for at least 5 minutes — this is where the magic happens and every piece gets fully saturated.

Step 5: Add the Apple Layer

Spoon the cooked cinnamon apples evenly over the soaked bread, filling in any gaps so every bite has a little apple in it.

Step 6: Make the Brown Sugar Crumble

In a small bowl, combine the remaining 3 tablespoons of softened butter with the remaining ¼ cup of brown sugar until the mixture looks crumbly. Sprinkle this evenly over the top of the casserole — it will melt into a caramelized crust as it bakes.

Step 7: Bake and Rest

Bake for 40–45 minutes, or until the custard is fully set and the top is golden brown. You’ll know it’s done when the center no longer jiggles when you gently shake the dish. Let the casserole rest for 10 minutes before serving — cutting too soon means the custard hasn’t fully firmed up yet.

Serve warm with maple syrup, powdered sugar, whipped cream, or additional fresh apple slices if desired.

Make It Your Own

Well, if you’re out of apples or just want to switch things up, ripe pears work beautifully here. They soften a little faster in the skillet, so reduce the cook time to about 6 minutes total — the technique and quantities stay exactly the same.

For a dairy-free version, swap the whole milk for unsweetened oat milk or full-fat coconut milk. Oat milk keeps the custard closest to the original texture, while coconut milk adds a faint tropical note that actually pairs nicely with the cinnamon. Use dairy-free butter in equal amounts for the skillet and the crumble topping.

If you’d like to add some crunch and protein, sprinkle ¼ cup of chopped pecans or walnuts over the apple layer before adding the brown sugar crumble. Nuts toast gently during baking and give you a satisfying contrast against the soft custard bread underneath. This is also a great way to make the dish feel more substantial for a holiday morning.

Looking for more make-ahead brunch ideas? This Southwest Turkey Egg Muffin Box is another batch-friendly option that pairs well alongside a sweet casserole on a brunch table.

Common Problems & Solutions

Problem: The center is still wet after 45 minutes. Tent the dish loosely with foil and bake for an additional 10 minutes. An undercooked center almost always means the bread wasn’t pressed down firmly enough to absorb the custard evenly — the top bakes fine while the middle stays underdone.

Problem: The top is browning too fast. Place a sheet of foil loosely over the dish after the first 25 minutes of baking. The brown sugar crumble caramelizes quickly, and a foil tent slows the browning without trapping steam.

Man, oh man — a soggy bottom after all that work is genuinely frustrating. Problem: The bottom layer is mushy. This usually means the bread cubes were packed too tightly or the dish was filled too deep. Spread the cubes in a single even layer with a little breathing room between them, and make sure your baking dish isn’t smaller than 9×13 inches.

Problem: The bread fell apart when I cut the loaf. Some gluten-free brioche loaves are more delicate than others when fresh. Day-old bread actually works better here — it’s slightly drier and absorbs the custard without disintegrating. If your loaf is very fresh, cube it and let the pieces sit uncovered on the counter for 30 minutes before using.

According to research from the Celiac Disease Foundation on gluten-free ingredient substitutions, certified gluten-free labels are the most reliable way to avoid cross-contamination — especially important when sourcing bread for a dish where the bread is the main ingredient.

Storage & Meal Prep

Method	Duration	Notes
Counter	2-3 days	Airtight container; best within the first day
Fridge	5-7 days	Cover tightly; bring to room temp before reheating
Freezer	2-3 months	Wrap individual portions in plastic wrap before freezing

To reheat from the fridge, cover the dish with foil and warm it in a 325°F oven for about 15 minutes. Individual portions reheat well in the microwave in 60–90 seconds — just cover loosely with a damp paper towel to keep the bread from drying out.

For a no-waste idea, leftover portions are outstanding crumbled over a bowl of yogurt with a drizzle of honey, or layered into a cinnamon roll protein yogurt bowl for a quick weekday breakfast.

Gluten-Free Cinnamon Apple French Toast Bake FAQs

Serving Suggestions

Serve this casserole warm with a generous drizzle of pure maple syrup and a dusting of powdered sugar. Whipped cream or a scoop of vanilla ice cream take it over the top for a special occasion — this is the kind of dish that earns a permanent spot on your Thanksgiving morning or Christmas brunch table.

For a complete spread, pair it with something savory to balance the sweetness. These Southwest Turkey Egg Muffin Boxes are a crowd-pleaser alongside the casserole, and they can be prepped the same night.

If you’re building a bigger make-ahead brunch menu, these Raspberry Almond Freezer Oat Squares pull straight from the freezer and round out a brunch spread without any extra morning effort. According to Harvard’s nutrition guidance on gluten-free eating, building balanced meals with whole-food ingredients matters as much as the gluten-free label itself — which is exactly why this recipe leans on real apples, eggs, and quality bread rather than packaged shortcuts.

If you tried this recipe, leave a rating and let me know how it turned out in the comments. Did you try a different fruit? A dairy-free swap? I read every comment and love hearing what worked in your kitchen — and sharing this on Pinterest helps other gluten-free families find it too.