This apple brioche breakfast casserole soaks slices of buttery bread in a sweet custard, layers them with spiced apples, and bakes into a golden dish that tastes like apple pie for breakfast.
Everything is assembled the night before and chilled for at least 8 hours, so the morning only calls for the oven. After about 50 minutes of baking, the edges turn crisp, the center sets soft, and the kitchen smells like baked apples and warm spice.
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Why This Apple Brioche Breakfast Casserole Recipe Works
Day old brioche or challah drinks up the custard without falling apart. Sliced half an inch thick, it holds its shape through the overnight soak and bakes into tender, custardy layers.
Gala apples are cooked in butter just until tender, then tossed with lemon juice and apple pie spice. That step keeps them from releasing too much water during the bake and adds a bright edge to the sweetness.
A spiced butter drizzle over the top right before baking creates a browned, slightly crisp surface. Letting the dish stand at room temperature for 30 minutes helps it bake evenly.
Ingredients for Apple Brioche Breakfast Casserole
- 16 slices day old brioche or challah bread, 1/2 inch thick, divided
- 6 tablespoons unsalted butter, divided
- 6 Gala apples, peeled and sliced
- 2 tablespoons lemon juice (from 1 lemon)
- 1 1/4 teaspoons apple pie spice, divided
- 8 large eggs
- 2 cups whole milk (or half and half)
- 2/3 cup granulated sugar
- 2 teaspoons pure vanilla extract
- 1/8 teaspoon kosher salt
- 2 tablespoons powdered sugar, for dusting
- 1/4 cup maple syrup, for serving
Brioche or challah. Rich, slightly sweet bread soaks up custard well. Use day old slices for the right texture.
Gala apples. They hold their shape when cooked and bring natural sweetness. Other apple types work too.
Eggs and milk. Whisked with sugar and vanilla, they form the custard that turns the bread into a soft, rich bake.
Apple pie spice. It flavors both the apples and the butter drizzle, so the whole dish tastes like pie.
Lemon juice. A splash brightens the apples and keeps them from browning.
How to Make Apple Brioche Breakfast Casserole
1. Prepare the dish Spray a 9×13 inch dish with nonstick cooking spray and arrange 8 slices of bread in it, overlapping them slightly.
2. Cook the apples Melt 2 tablespoons of the butter in a large skillet over medium heat. Add the apples and cook for 8 to 10 minutes, until just tender.
3. Season the apples Remove the skillet from the heat and stir in the lemon juice and 1 teaspoon of the apple pie spice.
4. Layer the casserole Spread the apples over the bread in the dish, then cover them with the remaining 8 bread slices.
5. Whisk the custard In a large bowl, whisk the eggs, milk, sugar, vanilla, and salt until smooth, then pour the custard over the bread and press it down gently with a spatula.
6. Chill overnight Cover the dish and refrigerate for at least 8 hours so the bread can soak up the custard.
7. Bring to room temperature When ready to bake, heat the oven to 350 degrees F and let the dish stand on the counter for 30 minutes.
8. Add the spiced butter Melt the remaining 4 tablespoons of butter, stir in the last 1/4 teaspoon of apple pie spice, and drizzle it over the top.
9. Bake and rest Bake for 40 to 50 minutes, until the center is set, the top is golden, and the center registers 160 degrees F. Let the dish stand for 10 minutes before serving.
How to Serve Apple Brioche Breakfast Casserole
Dust the top with powdered sugar and pass a pitcher of warm maple syrup at the table. For a full brunch spread, add a slice of cinnamon streusel coffee cake and a bowl of tater tot sausage breakfast casserole for a savory option. A glass of strawberry blueberry kefir smoothie and a few pumpkin doughnut muffins round out the table. Fresh fruit and whipped cream also go well.
How to Store and Reheat Apple Brioche Breakfast Casserole
Refrigerate leftovers in a covered container for up to 3 days. Reheat single portions in the microwave or a hot oven at 350 degrees F until hot throughout, with the center reaching 165 degrees F. Freezing is not recommended because the custard can turn watery.
Tips and Variations for Apple Brioche Breakfast Casserole
Use day old bread. Slightly stale bread soaks up custard without turning mushy.
Slice evenly. Half inch slices bake at the same rate and layer neatly.
Do not skip the rest. Letting the dish stand for 30 minutes before baking helps it cook evenly in the center.
Try other apples. Braeburn, Fuji, or Granny Smith can replace Gala apples.
Use half and half. Replacing the milk with half and half gives a richer custard.
Press the bread gently. Pressing the layers into the custard helps every slice soak evenly.
Cover well. Tight covering in the refrigerator keeps the bread from drying out.
Bake until set. Egg dishes should reach 160 degrees F, and the Montana State University Extension egg fact sheet explains safe handling for egg dishes.
Frequently Asked Questions About Apple Brioche Breakfast Casserole
Can I make apple brioche breakfast casserole without chilling it overnight?
The overnight soak is what gives the custardy texture, so plan for at least 8 hours in the refrigerator.
Which bread suits apple brioche breakfast casserole?
Day old brioche or challah gives rich, sturdy slices. Thick sliced white bread can work in a pinch.
How do I know apple brioche breakfast casserole is done?
The center should be set, the top golden, and a thermometer in the center should read 160 degrees F.
Can I use different apples?
Yes. Braeburn, Fuji, or Granny Smith all work. Cook them until just tender.
How should I reheat leftovers?
Warm portions in the microwave or a hot oven at 350 degrees F until hot throughout, reaching 165 degrees F.
Overnight Apple Pie Brioche Casserole with Spiced Butter
Equipment
- 9×13 inch baking dish
- Large skillet
- Large mixing bowl
- Whisk
Ingredients
Main Ingredients
- 16 slices day old brioche or challah bread 1/2 inch thick, divided
- 6 tbsp unsalted butter divided
- 6 Gala apples peeled and sliced
- 2 tbsp lemon juice from 1 lemon
- 1 ¼ tsp apple pie spice divided
- 8 large eggs
- 2 cup whole milk or half and half
- ⅔ cup granulated sugar
- 2 tsp pure vanilla extract
- ⅛ tsp kosher salt
- 2 tbsp powdered sugar for dusting
- ¼ cup maple syrup for serving
Instructions
Cooking
- Layer the bread. Spray a 9×13 inch dish and arrange 8 overlapping slices of bread in it.
- Cook the apples. Cook the apples in 2 tablespoons butter over medium heat for 8 to 10 minutes until just tender, then stir in the lemon juice and 1 teaspoon apple pie spice. Spread over the bread and top with the remaining bread.
- Add the custard. Whisk the eggs, milk, sugar, vanilla, and salt, pour over the bread, press down gently, cover, and refrigerate at least 8 hours.
- Prepare to bake. Heat the oven to 350 degrees F and let the dish stand 30 minutes. Mix the remaining melted butter with the last 1/4 teaspoon apple pie spice and drizzle on top.
- Bake. Bake 40 to 50 minutes until set and golden, with the center at 160 degrees F.
- Rest and serve. Let stand 10 minutes, dust with powdered sugar, and drizzle with maple syrup.
