If you’ve never tried cider in French toast, prepare to be obsessed. The reduction concentrates the autumn-spiced sweetness, while thick slices of sturdy brioche soak up every drop of cinnamon-laced custard. A whisper of sparkling cider (or prosecco if you’re feeling festive) adds just enough lightness to keep the casserole from tipping into dessert territory, while a crunchy brown-sugar oat streusel bakes up like crème-brûlée’s cozy cousin. One bite and you’ll understand why my guests inevitably push their plates away with a satisfied sigh and say, “Okay, this is how we’re starting every year from now on.”

Why This Recipe Works

Overnight magic: Assemble everything the night before and simply slide it into the oven—no flipping individual slices while your hair is still wet.
Cider reduction: Boiling down fresh apple cider concentrates flavor without excess liquid, so the casserole tastes intensely apple-forward, not soggy.
Brioche, not just any bread: Its buttery richness stands up to the custard and bakes into cloud-like layers.
Sparkling lift: A splash of bubbly in the custard adds lightness and a subtle celebratory note.
Crunchy oat streusel: Toasted oats, brown sugar, and butter create a crackly lid that contrasts every spoonful.
Feeds a crowd: One 9×13 pan yields 12 generous squares—perfect for overnight guests or a buffet brunch.
Make-ahead friendly: Bakes straight from the fridge, travels well to potlucks, and reheats like a dream.

Ingredients You'll Need

Great French toast casserole starts with great bread. Look for an unsliced brioche loaf from the bakery section; it should feel light for its size and have a shiny, golden dome. If brioche is elusive, challah or even a sturdy country white work, but avoid pre-sliced sandwich bread—it turns to mush. Cube the loaf into 1-inch pieces and leave them uncovered overnight so they stale slightly; dry bread drinks up custard without collapsing.

Next, the cider. Seek out fresh, unpasteurized apple cider from an orchard if possible—it has deeper flavor and gorgeous aromatics. Reduce two cups down to ½ cup; you want it syrupy enough to coat a spoon. If all you can find is shelf-stable juice, bump the reduction to ⅓ cup and add a pinch more lemon juice for brightness.

For dairy, I use a 50/50 blend of whole milk and heavy cream. The fat keeps the custard silky, but all cream can feel greasy. If you’re dairy-free, full-fat coconut milk is a surprisingly delicious stand-in; the subtle coconut plays nicely with apple pie spices.

Eggs should be large and at room temperature so they emulsify smoothly. Whisk in dark brown sugar rather than white for caramel depth, plus a whisper of maple syrup for New-England authenticity. A teaspoon of vanilla bean paste is lovely, but extract is fine. The spice lineup—cinnamon, nutmeg, cardamom, and a pinch of cloves—echoes mulled cider. Don’t skip the salt; it sharpens every other flavor.

Finally, the streusel. Old-fashioned oats give nubby texture, while flour, brown sugar, and cold butter create shaggy clumps. Toasting the oats for five minutes in a dry skillet intensifies their nuttiness and keeps them crisp even after baking.

How to Make Warm Apple Cider French Toast Casserole for New Years

Reduce the cider

In a small saucepan, bring 2 cups fresh apple cider to a gentle boil over medium-high heat. Reduce to ½ cup, about 15 minutes, swirling occasionally. Pour into a heat-proof measuring cup and cool to lukewarm.

Prep your pan & bread

Lightly butter a 9×13-inch baking dish. Cube brioche into 1-inch pieces (about 12 cups). Spread evenly in the dish; set aside while you make the custard.

Whisk the custard

In a large bowl, whisk 6 large eggs with ⅓ cup dark brown sugar, 2 Tbsp maple syrup, 1 tsp vanilla bean paste, 1 tsp cinnamon, ¼ tsp nutmeg, ¼ tsp cardamom, ⅛ tsp cloves, and ½ tsp kosher salt until smooth. Stream in 1 cup whole milk, 1 cup heavy cream, the reduced cider, and ¼ cup sparkling cider (or prosecco) until fully incorporated.

Soak overnight

Pour custard evenly over bread cubes. Press down gently so every piece is moistened. Cover tightly with foil and refrigerate at least 4 hours or up to 24. The longer soak yields silkier centers.

Make the oat streusel

In a dry skillet, toast ¾ cup old-fashioned oats over medium heat until fragrant, 4–5 minutes; cool completely. Toss with ⅓ cup all-purpose flour, ⅓ cup brown sugar, ½ tsp cinnamon, and ¼ tsp salt. Cut in 4 Tbsp cold unsalted butter until clumpy; refrigerate until ready to use.

Bake

Preheat oven to 350 °F (177 °C). Remove casserole from fridge while oven heats. Sprinkle streusel evenly over top. Bake uncovered 40 minutes, tent with foil if browning too quickly, then bake 10–15 minutes more until puffed and center registers 200 °F. Let rest 10 minutes before serving; dust with powdered sugar and drizzle with warm maple-cider syrup.

Expert Tips

Flip halfway

If your fridge is extra-cold, give the pan a gentle flip with a spatula halfway through soaking to ensure even saturation.

Custard test

Press the top lightly before baking—if pools of liquid appear, let it soak 15 minutes more; if it looks dry, drizzle 2 Tbsp extra milk.

Temperature trumps time

Ovens vary; use an instant-read thermometer. Center should hit 200 °F for set custard without curdling.

Keep it warm

Hold finished casserole in a 200 °F oven up to 30 minutes; place a clean kitchen towel between pan and foil to prevent condensation.

Variations to Try

Pear-Cranberry: Swap half the cider for pear nectar and fold 1 cup fresh cranberries into the bread cubes.
Apple Cider Bourbon: Replace sparkling cider with 2 Tbsp bourbon; add ½ cup toasted pecans to streusel.
Dairy-Free: Use coconut milk beverage and coconut cream; substitute vegan butter in streusel.
Individual Jars: Layer everything into twelve 8-oz mason jars; bake 25 minutes for adorable single-serve portions.
Savory-Sweet: Omit sugar in custard, add ½ cup sharp white cheddar and 4 slices cooked crumbled bacon for a brunch twist.

Storage Tips

Make-Ahead: Assemble through Step 4, cover tightly, and refrigerate up to 24 hours. Streusel can be mixed and stored separately up to 3 days.

Leftovers: Cool completely, cut into squares, and refrigerate in an airtight container up to 4 days. Reheat single portions in microwave 30–40 seconds or warm entire pan, covered with foil, at 325 °F for 15 minutes.

Freezer: Wrap baked, cooled squares individually in plastic wrap, then foil; freeze up to 2 months. Thaw overnight in fridge and reheat as above.

Frequently Asked Questions

Yes, but reduce 2 cups to ⅓ cup and add 1 tsp lemon juice for acidity. Flavor will be milder; add an extra ¼ tsp cinnamon if desired.

Toasting deepens flavor and prevents sogginess, but you can skip if short on time. Add an extra tablespoon of flour to absorb moisture.

Absolutely. Halve all ingredients and bake in an 8×8-inch pan for 30–35 minutes. Check center temperature at 200 °F.

Use ¼ cup seltzer, ginger ale, or prosecco. The bubbles lighten the custard; still liquid works but texture will be denser.

Diced apples or pears (1 cup) can be folded in before soaking; reduce milk by 2 Tbsp to compensate for extra moisture.

Edges will puff and brown, streusel will be crisp, and a thermometer inserted at center should read 200 °F. A slight jiggle is okay; it sets as it rests.

Warm Apple Cider French Toast Casserole for New Years

Why This Recipe Works

Ingredients You'll Need