Eggnog French Toast Bake (Easy Overnight Christmas Breakfast)

Christmas morning should smell like nutmeg, warm butter, and something golden bubbling in the oven — and that is exactly what this Eggnog French Toast Bake delivers. Cubes of soft brioche soak up a rich, spiced eggnog custard overnight, then bake into a puffy, caramel-edged casserole that tastes like the holidays themselves. You do ten minutes of easy work tonight, and tomorrow all you do is slide the dish into the oven and take the credit.

If you love make-ahead holiday breakfasts, this one is about to become your new tradition. It feeds a crowd from a single 9×13 dish, reheats beautifully, and makes the whole house smell like a Christmas candle in the best possible way.

Recipe at a Glance

• Prep time: 15 minutes
• Chill time: Overnight (or at least 1 hour)
• Bake time: 45 to 55 minutes
• Total time: About 1 hour 10 minutes, plus chilling
• Servings: 8 generous servings
• Category: Breakfast
• Method: Overnight baked French toast casserole

Why This Method Works

A classic French toast soak is all about the custard ratio, and an overnight bake takes that science one delicious step further. Instead of dipping individual slices for a few seconds, the bread cubes sit in the eggnog custard for hours. The stale, open crumb of day-old brioche drinks it up slowly and evenly, so every cube turns custardy inside while the top cubes toast into golden, almost caramelized peaks. Eggnog itself is already a spiced custard of milk, cream, sugar, and eggs, so it seasons and sweetens the soak in one pour — no separate milk, sugar, and spice measuring. The long chill also lets the egg proteins fully hydrate the bread, which is why the bake sets into a sliceable, spoonable casserole instead of a soggy heap.

Ingredients

• 10 to 12 cups cubed day-old brioche or challah (about 1 pound loaf), cut into 1-inch cubes
• 6 large eggs
• 2 1/2 cups store-bought or homemade eggnog
• 1/2 cup packed brown sugar
• 1 teaspoon ground cinnamon
• 1/2 teaspoon freshly grated nutmeg, plus more for dusting
• 1 teaspoon pure vanilla extract
• 1/4 teaspoon fine salt
• 4 tablespoons (1/2 stick) unsalted butter, melted
• Warm maple syrup, powdered sugar, and sugared cranberries, for serving

Directions

1. Cube the bread. Spread the bread cubes in a single layer on a rimmed baking sheet and let them sit out for 2 to 3 hours (or overnight) to go slightly stale. Stale bread is thirsty bread — it soaks up the custard without falling apart.
2. Whisk the custard. In a large bowl, whisk together the eggs, eggnog, brown sugar, cinnamon, nutmeg, vanilla, and salt until the sugar dissolves and the mixture looks silky and lightly foamy.
3. Soak overnight. Grease a 9×13-inch baking dish with butter. Add the bread cubes, pour the custard evenly over the top, and press gently so every cube gets coated. Drizzle with the melted butter, cover tightly, and refrigerate at least 1 hour — overnight is best.
4. Bake golden. In the morning, take the dish out of the fridge while the oven heats to 350°F. Uncover and bake 45 to 55 minutes, until the top is puffed and deep golden and a knife inserted in the center comes out clean. If the top browns too fast, tent loosely with foil for the last 10 minutes.
5. Rest and serve. Let the bake rest 10 minutes so the custard finishes setting, then dust with nutmeg and powdered sugar. Serve warm with maple syrup.

Pro Tips for the Best Eggnog French Toast Bake

• Use day-old bread, always. Fresh, soft bread turns to mush in an overnight soak. Stale brioche or challah gives you that dreamy custard-inside, toasted-outside contrast.
• Do not skip the rest. Those 10 minutes off the heat are when the center finishes setting. Slice too early and the custard runs; wait and it scoops into perfect squares.
• Grate your nutmeg fresh. Eggnog lives and dies by nutmeg, and freshly grated has a warmth that the pre-ground jar just cannot match. A microplane and ten seconds is all it takes.
• Make a double batch for a crowd. This recipe scales perfectly into two 9×13 dishes — one for Christmas morning, one for the in-laws. Pair it with an easy homemade pumpkin spice latte and breakfast is completely handled.

Common Mistakes to Avoid

• Soggy center: This usually means the bake was underbaked or cut too early. Bake until a knife in the center comes out clean and the whole dish looks puffed — the center should reach 160°F, the safe temperature for egg dishes.
• Dry, bready bites: Happens when some cubes never got custard. Press the bread down into the custard after pouring, and flip the top cubes once halfway through the chill if you remember.
• Burnt top, raw middle: Your oven may run hot. Start checking at 40 minutes and tent with foil the moment the top looks done.

Substitutions and Variations

• No brioche? Challah, French bread, or even sturdy sandwich bread works. Avoid very soft white bread, which dissolves in the soak.
• Homemade eggnog: Absolutely use it if you have it — just make sure it is made with pasteurized eggs or cooked to a safe temperature, since it will not fully cook until the bake sets.
• Dairy-free: Use a dairy-free eggnog alternative and swap the butter for melted coconut oil. The custard sets a touch softer but still slices.
• Add-ins: Fold in a cup of chopped pecans, dried cranberries, or diced apples with the bread cubes for extra holiday cheer.
• Rum-raisin twist: Soak 1/2 cup raisins in 2 tablespoons of rum (or apple juice) and scatter over the bread before the custard — very Christmas.

Storage and Make-Ahead

This is the ultimate make-ahead Christmas breakfast: assemble the full dish up to 24 hours ahead and keep it covered in the fridge. Bake straight from cold, adding 5 extra minutes if needed. Leftovers keep in an airtight container in the refrigerator for up to 4 days — reheat individual portions in the microwave or warm the whole dish, covered with foil, at 325°F for about 20 minutes. For longer storage, freeze baked squares for up to 2 months and thaw overnight in the fridge before reheating. Serve alongside bakery-style pumpkin muffins for a full holiday brunch spread.

Frequently Asked Questions

Can I make eggnog French toast bake ahead of time?

Yes — that is the whole point. Assemble the dish the night before, cover, and refrigerate for at least 1 hour or up to 24 hours. In the morning, bake straight from the fridge at 350°F for 45 to 55 minutes.

What is the best bread for a French toast bake?

Day-old brioche or challah is ideal. Their rich, sturdy crumb absorbs the eggnog custard without turning mushy, and the tops bake into crisp, golden peaks. French bread is a good backup.

Can I use homemade eggnog instead of store-bought?

Yes. Use any eggnog you like, homemade or store-bought. If your homemade eggnog uses raw eggs, make sure it is made with pasteurized eggs, since the custard only fully cooks once the bake sets in the oven.

How do I know when the French toast bake is done?

It is done when the top is puffed and deep golden, the edges look set, and a knife inserted in the center comes out clean. For food safety, the center of an egg custard dish should reach 160°F.

Looking for another cozy make-ahead morning treat? Try our 5-ingredient pumpkin loaf — it bakes up just as easily and keeps the holiday kitchen smelling wonderful.