If your New Year’s morning ritual involves champagne bubbles, cozy pajamas, and a houseful of sleepy guests, this New Year’s Day Avocado Toast Casserole with Eggs was written just for you. I started baking it three years ago after one too many frantic brunches where I found myself juggling skillets of eggs, avocado mashing, and a toaster that refused to cooperate. My family wanted the comforting flavors of avocado toast—creamy avocado, jammy eggs, crusty sourdough—but I wanted the ease of sliding a single pan onto the breakfast table and declaring, “Brunch is served!”

This casserole tastes like your favorite cafe order got wrapped up in a warm hug. The bottom layer bakes into a custardy, French-toast–like base infused with lime-zest avocado, while the top nests whole eggs that finish just-set for that Instagram-worthy yolk drip. A snow-like dusting of cotija, chopped cilantro, and a drizzle of chili-lime crema finish things off with just enough sparkle to feel celebratory. It’s filling yet bright, healthy-ish but indulgent, and—best of all—bakes entirely in one dish while you clink mimosas and reminisce about the night before.

Why This Recipe Works

Bake-Ahead Friendly: Assemble the base tonight, refrigerate, then crack the eggs on top in the morning.
Restaurant-Style Eggs: Whole eggs go in 15 min before serving—no rubbery scrambles.
All-in-One Pan: Toast cubes soak up a garlicky avocado custard so every bite tastes like the best avocado toast.
Customizable Heat: Swap jalapeños for bell pepper or amp up with serranos for extra kick.
Vegetarian Protein: 12 g+ protein per slice thanks to eggs, Greek yogurt, and cotija.
Teal-Label Pretty: The emerald avocado + teal styling makes it a centerpiece.

Ingredients You'll Need

Great avocado toast starts at the produce aisle, and this casserole is no exception. Ripe-yet-firm avocados give the silky richness we crave without turning army-green under heat. Look for fruit that yields slightly at the stem but still feels bouncy, not mushy. For the bread, choose a naturally leavened sourdough or country loaf; its tangy chew stands up to custard and creates those crave-worthy toasted edges. Stale bread actually works better, so buy a loaf a day or two early (or cube and freeze).

Eggs are the star garnish, so spring for pasture-raised if you can; the yolks blaze a brighter sunset orange that photographs like a dream. Whole-milk Greek yogurt adds protein and a gentle tang, replacing the more classic heavy cream so you can still button your New-Year’s-resolution jeans come January 2. A splash of hot sauce in the custard wakes everything up; I keep a bottle of Valentina on hand for its mild chile flavor and mellow vinegar note.

The mix-ins are adaptable: diced Roma tomato brings freshness; minced jalapeño gives a controlled heat; chopped cilantro stems perfume the custard. Cotija or queso fresco melts just enough to form salty pockets, but feta works in a pinch. Finish with lime zest and a squeeze right before serving—the acid keeps the avocado vibrant even after a second trip to the oven.

How to Make New Year's Day Avocado Toast Casserole with Eggs

Prep Your Pan & Oven

Position rack in center; preheat to 375 °F (190 °C). Generously butter a 9×13-inch ceramic or glass baking dish; set on a sheet tray for easy transport. Cube sourdough into ¾-inch pieces; you need about 8 packed cups (350 g). Day-old bread is ideal; if fresh, toast cubes on a sheet pan for 8 min to dry slightly.

Whisk the Avocado Custard

Halve, pit, and scoop 2 medium avocados into a large bowl. Mash with 2 Tbsp lime juice until mostly smooth but still a bit chunky for texture. Whisk in 4 large eggs, 1 cup plain whole-milk Greek yogurt, 1 cup whole milk, 2 tsp Dijon mustard, 1 tsp hot sauce, 1 tsp kosher salt, ½ tsp black pepper, and ½ tsp garlic powder. The mixture should resemble thick guac-latte—don’t worry, it thins as it bakes.

Fold in Bread & Veggies

Add bread cubes, 1 cup diced tomato, ½ cup finely chopped red onion, and 1 small jalapeño (seeded if you like mild). Toss until every cube is coated. Let stand 10 min so the bread can drink up custard. Meanwhile, crumble ¾ cup cotija; reserve ¼ cup for later.

Pack & Top

Scrape mixture into prepared dish, pressing lightly to level. Sprinkle remaining cotija, 2 Tbsp cilantro stems, and ¼ tsp smoked paprika for color. Cover with foil; bake 20 min to set the custard.

Create Wells for Eggs

Remove dish; uncover. Using the back of a large spoon, press 6–8 shallow wells, spacing evenly. Crack 1 egg into each well; sprinkle eggs with a pinch of salt & pepper. Return to oven, uncovered, 12–15 min for jammy centers (or 18 min for hard-set).

Broil & Finish

Switch oven to broil 500 °F for 1–2 min to blister cheese and set whites. Watch closely! Remove, let rest 5 min (custard firms as it cools). Top with diced avocado, chopped cilantro, and a zig-zag of lime crema made by stirring ½ cup yogurt with 1 Tbsp lime juice and a dash of hot sauce.

Expert Tips

Use a Clear Dish

Glass lets you peek underneath to see when custard is set and prevents over-browning at the edges.

Save Avocado Pits

Nestle pits into leftover guac or custard to slow oxidation and keep green color vibrant.

Make-Ahead Strategy

Assemble through Step 4, cover tightly, and refrigerate up to 12 hr. Add 5 min to covered bake time.

Dairy-Free Swap

Replace yogurt & milk with full-fat coconut milk; omit cotija and sprinkle toasted pepitas on top.

Spice Control

Remove jalapeño ribs & seeds for mild, or sub roasted poblano strips for smoky sweetness.

Reheat Like a Pro

Warm individual squares in a 300 °F oven 10 min; add a fresh egg if you want that runny yolk again.

Variations to Try

Smoked Salmon & Dill: Sub smoked paprika for everything-bagel seasoning; top finished casserole with ribbons of lox and fresh dill.
Southwestern Corn: Fold in ¾ cup roasted corn kernels and 1 tsp chipotle powder; garnish with queso fresco and pickled red onions.
Mediterranean: Swap jalapeño for sun-dried tomato, add ½ cup chopped spinach and 1 tsp oregano; finish with crumbled feta and chopped olives.
Breakfast-Meets-Bruschetta: Top finished eggs with a quick salad of diced tomato, basil, minced garlic, balsamic drizzle, and shaved Parmesan.

Storage Tips

Refrigerate: Cool casserole completely, cut into squares, and store in an airtight container up to 4 days. Keep extra avocado topping separate; press plastic wrap directly onto surface to prevent browning.

Freeze: Baked squares (minus fresh avocado garnish) freeze beautifully. Wrap each in plastic, then foil, up to 2 months. Thaw overnight in fridge and reheat at 300 °F 12-15 min.

Make-Ahead Parties: Assemble the base in a disposable foil pan, cover with foil, and freeze unbaked for up to 1 month. Bake from frozen at 350 °F 45 min covered, 15 min uncovered, adding eggs in the final 15 min.

Frequently Asked Questions

You can, but choose a minimally seasoned version. Skip added salt in the custard and taste before baking—many packaged guacs contain lime and garlic already.

Gently shake the dish: whites should be opaque and barely jiggle. For instant-read thermometers, yolk temp around 160 °F yields jammy centers.

Yes—use two 9×13 pans or one deep half-sheet pan. Add 5–8 min to covered bake; rotate pans halfway for even browning.

A sturdy gluten-free sourdough or seeded loaf holds up best. Avoid delicate sandwich bread; it can dissolve into mush.

Not as written due to bread. For a low-carb spin, substitute cubed keto bread or roasted cauliflower florets and reduce milk to ½ cup.

Microwaving can toughen eggs. Reheat in a 300 °F toaster oven 8–10 min, covering with foil to prevent over-browning.

New Year's Day Avocado Toast Casserole with Eggs

Why This Recipe Works

Ingredients You'll Need