This Apple Pie French Toast Baked Casserole is a make-ahead breakfast dish made with cubed brioche bread, a spiced apple filling, and a rich egg custard poured over the whole thing.

Everything goes into one baking dish the night before, and by morning you just slide it in the oven and let it do its thing.

It’s the kind of recipe you pull out when you have people staying over or want something special on a Sunday morning without standing at the stove.

I’ve made it for holiday mornings and slow weekends. It pairs well alongside Egg Muffins with Spinach and Bacon if you’re feeding a crowd and want a savory option on the table too.

If you’re into baked breakfast and brunch recipes, these are worth bookmarking too:

• Egg Muffins with Spinach and Bacon
• Mom’s Zucchini Pancakes Recipe (Easy, Fluffy)
• Healthy Vegetable Muffins with Carrot and Broccoli
• 26 Amazing Mothers Day Brunch Food Ideas

Ingredients You’ll Need

Brioche is the best bread here because it soaks up the custard without falling apart.

Challah works just as well. The apples should be a firmer variety like Granny Smith or Honeycrisp so they hold their shape during cooking instead of turning to mush.

Important Recipe Notes

• Overnight soaking makes a real difference: Two hours is the minimum but overnight is noticeably better. The bread fully absorbs the custard overnight and bakes up with an even, custardy texture throughout. With only two hours, you might get dry spots in the center of the thicker bread pieces.
• Use sturdy bread: Soft sandwich bread will turn to mush after soaking overnight. Brioche and challah have enough structure to hold up. A day-old loaf actually works better than fresh since slightly stale bread absorbs liquid more evenly without falling apart.
• Cook the apples before adding them: Raw apple pieces added directly to the casserole release too much liquid during baking and make the bottom layer soggy. The few extra minutes to saute them first is worth it.
• Keep the streusel cold: Cold butter is what gives streusel its crumble texture. If the butter softens too much before baking, the topping turns into a paste instead of crispy crumbs. Refrigerate it right after mixing and scatter it on just before the dish goes into the oven.
• Storage: Leftovers keep in a covered container in the fridge for up to 3 days. Reheat individual portions in the microwave for 60 to 90 seconds, or cover the whole dish with foil and warm at 325 degrees F for about 15 minutes. The streusel topping softens after refrigeration but still tastes good.

How to Serve, Store & Customize This Recipe

Serving: Serve warm straight from the baking dish with maple syrup on the side. A dusting of powdered sugar adds a nice finish without being too sweet.

It’s filling enough on its own, but a side of fresh fruit or yogurt rounds out the meal if you’re feeding a crowd at brunch.

Storing: Leftovers keep covered in the fridge for up to 3 days. Reheat individual slices in the microwave for 60 to 90 seconds.

The streusel will soften in the fridge, but a few minutes under the broiler after reheating can bring some crunch back. Frozen slices (wrapped individually) keep for up to 1 month and reheat well from frozen.

Customizing: Swap the maple syrup in the custard for brown sugar if you don’t have it on hand. Pears work well in place of apples and give the filling a slightly softer texture.

For a crunchier topping, add a handful of chopped pecans or walnuts to the streusel mix. You can also skip the streusel entirely and just dust generously with powdered sugar right before serving.