Apple French Toast Casserole (Make-Ahead Brunch Bake)
A make-ahead apple French toast casserole with thin-sliced apples baked directly into a custard-soaked brioche base. Designed for clean slices, balanced texture, and stress-free brunch service.
Equipment
- 9x13 baking dish
- Mixing bowl
- Whisk
- Rubber spatula
- Chef’s knife or mandoline
- Cutting Board
Ingredients
Base
- 1 lb brioche or challah cut into 1-inch cubes, dried
- 2½ –3 apples Honeycrisp + Granny Smith, thinly sliced (⅛” or less)
Apple Seasoning
- 2 tablespoon brown sugar
- 1 teaspoon cinnamon
- Pinch of salt
- Optional: 1 teaspoon flour for moisture control
Custard
- 6 large eggs
- 2 cups whole milk
- ½ cup heavy cream
- ⅓ cup sugar
- 1 tablespoon vanilla extract
- ½ teaspoon kosher salt
Finish
- 2 tablespoon European-style butter cubed
- Maple syrup for serving
- Powdered sugar optional
Instructions
Prepare the Bread
- Cube bread and allow it to dry out at room temperature for several hours or overnight.
- (Shortcut: bake at 300°F for 10–12 minutes to dry lightly.)
Prepare the Apples
- Slice apples very thin (⅛” or less).
- Toss with brown sugar, cinnamon, and a pinch of salt.
- Optional: add a light dusting of flour to help absorb excess moisture.
Build the Casserole
- Butter the baking dish.
- Layer bread and apples evenly, distributing apples throughout — not just on top.
- Make the Custard
- Whisk eggs, milk, cream, sugar, vanilla, and salt until fully combined.
Soak
- Pour custard evenly over the bread mixture.
- Press gently to ensure full absorption.
- Rest at least 30 minutes or cover and refrigerate overnight.
Bake
- Preheat oven to 350°F.
- Top with small cubes of butter.
- Bake 40–50 minutes until:
- Top is golden brown
- Center is just set with a slight jiggle
Rest & Serve
- Rest 10–15 minutes before serving for clean slices.
- Serve warm with maple syrup and optional powdered sugar.
Notes
Slice apples thin — this determines final texture
Do not overload with apples; too much moisture will break the custard
Day-old or dried bread is essential for structure
Slight jiggle in center = perfect doneness
If casserole firms too much, serve with warm syrup or a splash of cream
Do not overload with apples; too much moisture will break the custard
Day-old or dried bread is essential for structure
Slight jiggle in center = perfect doneness
If casserole firms too much, serve with warm syrup or a splash of cream
