Eggnog French Toast Casserole
On a busy December morning, a breakfast that does its own work is a real gift. This casserole turns cubes of bread, eggnog, eggs, and warm spices into a custardy bake with a brown sugar oat crumble on top, so it tastes like French toast without any standing at the stove. It suits Christmas morning, holiday guests, and lazy weekend brunches, and it feeds 8. You can bake it right away or assemble it the night before and slide it into the oven when everyone wakes up.
What Makes This Recipe Special
- Eggnog is the custard base, so one carton brings creamy richness and holiday flavor along with the eggs, vanilla, cinnamon, and nutmeg.
- A brown sugar and oat crumble bakes into a crunchy topping that contrasts with the soft, custardy bread underneath.
- You choose the bread: brioche for richness, French bread for a classic bite, or multigrain for a heartier bake.
- It works two ways from one dish, baked straight away or covered and chilled overnight for the next morning.
Ingredients
1 loafbrioche, French bread, or multigrain bread, 16 to 18 oz
2 cupseggnog
4 largeeggs
1 teaspoonvanilla extract
1/2 teaspoonground cinnamon
1/2 teaspoonground nutmeg
2/3 cuppacked brown sugar
1/3 cupwhole wheat pastry flour or all-purpose flour
1/3 cuprolled oats
1/2 teaspoonground cinnamon
1/2 teaspoonground nutmeg
1/4 cupunsalted butter, melted
Instructions
1
Grease a 9 x 13-inch baking dish well. If you are baking straight away, turn the oven on to 350°F.
2
Cube the bread into 1-inch pieces and spread them out in an even layer in the greased dish.
3
In a big bowl, whisk the eggnog with the eggs, vanilla, cinnamon, and nutmeg until smooth. Pour it over the bread and gently turn the cubes so each one is coated.
4
In a separate bowl, mix the brown sugar, flour, oats, cinnamon, and nutmeg. Add the melted butter and stir with a fork until the crumble is evenly moist, then sprinkle it over the bread.
5
Slide the dish into the oven and bake for about 30 minutes, until the top is golden brown.
6
If you would rather bake it the next morning, cover the dish with foil and refrigerate it overnight. When you are ready, remove the foil and bake at 350°F for 35 to 40 minutes, until golden brown.
Essential Tips
Choose a sturdy loaf
The recipe calls for a 16 to 18 oz loaf of brioche, French bread, or multigrain bread. Cut it into 1-inch cubes so the pieces stay distinct and absorb the custard without collapsing.
Coat every cube gently
After pouring the eggnog mixture over the bread, turn the cubes with a light hand so every piece gets soaked. Dry pockets bake up chewy and plain, while a gentle toss keeps the cubes whole.
Mix the crumble with a fork
A fork moistens the brown sugar, flour, oats, and spices evenly without compacting them. Scatter the crumble in loose clumps so it browns and crisps instead of melting into a sheet.
Cover tightly for overnight
If you are baking the next morning, wrap the dish in foil so the top does not dry out or pick up fridge smells. Take the foil off before baking, and aim for the longer end of 35 to 40 minutes since the dish starts cold.
Judge doneness by the center
A golden brown top is the visual cue, but check that the middle is set and not wet with custard. If the crumble darkens before the center sets, loosely tent the dish with foil for the rest of the bake.
Smart Swaps & Variations
Whole-grain heartier bake
Use multigrain bread and whole wheat pastry flour in the crumble for a nuttier, more filling casserole. The oats and whole wheat flour pair well with the cinnamon and nutmeg.
Pecan crunch
Stir a handful of chopped pecans into the crumble before scattering it over the bread. They toast as the casserole bakes and add a buttery crunch.
Cranberry-orange
Toss dried cranberries and a little orange zest through the bread cubes before pouring on the custard. The tart fruit cuts through the sweetness of the eggnog.
What to Serve With This
- Warm maple syrup on the table for pouring over each square.
- Crisp bacon or breakfast sausage for a salty side.
- Fresh fruit such as orange segments or berries to brighten the plate.
- Hot coffee, hot chocolate, or fresh orange juice for a Christmas brunch spread.
Storage & Reheating
Storage
Cover leftover casserole and refrigerate for up to 3 days, since it is egg-based. Cooled squares can also be wrapped individually and frozen for up to 2 months.
Reheating
Reheat portions on a baking sheet in a 350°F oven, covered with foil, for 10 to 15 minutes, then uncover for the last few minutes to re-crisp the crumble. A microwave works for a single square, but the topping will soften.
Expert Chef Tips
- Use bread that is a day or two old, or dry the cubes out for a little while before using, so they drink up the custard without turning mushy.
- Shake the eggnog carton well before measuring, because brands vary in thickness, and a thicker eggnog gives a richer, denser custard.
- For the crispest possible topping, keep the crumble in an airtight container and scatter it on just before baking instead of letting it sit on the custard overnight.
Equipment You’ll Need
- 9 x 13-inch baking dish, well greased
- Serrated bread knife for cutting even 1-inch cubes
- Two mixing bowls, one large for the custard and one smaller for the crumble
- Whisk, fork, and foil for mixing and covering the overnight version
Nutritional Benefits
- Eggs and eggnog supply protein and some calcium, which makes this more filling than plain toast.
- Rolled oats and whole wheat pastry flour in the crumble add a little fiber.
- The sweetness comes from the eggnog and brown sugar, so this is a holiday treat rather than an everyday breakfast.
- Choosing multigrain bread bumps up the whole-grain content without changing how the casserole bakes.
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Frequently Asked Questions
Can I use light or homemade eggnog?
Yes, either one works. Thick store-bought or homemade eggnog gives the richest custard, while a light version makes a slightly less rich bake.
Which bread works best?
The recipe calls for a 16 to 18 oz loaf of brioche, French bread, or multigrain bread. Day-old, sturdy bread holds up best because it absorbs the custard without going soggy.
Can I assemble it the night before?
Yes, that is built into the recipe. Cover the dish with foil, refrigerate it overnight, then uncover and bake at 350°F for 35 to 40 minutes.
Why is the middle soggy?
Soft, fresh bread, an underbaked center, or cubes that were not evenly coated can all cause it. Use sturdy bread and bake until the center is set and the top is golden brown.
Can I use eggnog that contains alcohol?
Baking does not remove all of the alcohol, so for guests who avoid it, choose a non-alcoholic eggnog. Either style bakes the same way.
Can I make it dairy-free?
Eggnog contains dairy, so you would need a plant-based eggnog and a dairy-free butter for the crumble. Expect a slightly different texture, and watch the bake time.
Can I make it gluten-free?
Use a gluten-free bread, swap in gluten-free flour for the crumble, and choose certified gluten-free oats. The custard itself contains no gluten.
Can I freeze the baked casserole?
Yes, cool it completely, cut it into squares, and freeze in airtight wrapping for up to 2 months. Reheat in the oven so the crumble crisps up again.
How do I keep the crumble crisp?
Bake it uncovered so the topping can brown, and reheat leftovers in the oven rather than the microwave. Holding back the crumble until just before baking also keeps it crunchier.
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