Start by roasting your poblano peppers to bring out their smoky flavor and charred skin. This is the key to creating an authentic taste for your casserole.

How to roast poblano peppers: Place the peppers directly on a gas burner or under the broiler in your oven. Turn the peppers occasionally until the skins are blackened and blistered all over.

Once roasted, place the peppers in a bowl and cover it with a lid or plastic wrap. Let them steam for about 10 minutes—this helps loosen the skin.

After they cool slightly, peel off the charred skin, cut off the stems, and remove the seeds. Slice them into strips or chop into smaller pieces.

Next, you'll prepare the egg base, which gives the casserole its signature custard-like texture. Here's how to make the perfect blend:

In a large bowl, beat eggs with milk, flour, baking powder, and a pinch of salt. This creates the smooth, fluffy base for the casserole.

Stir in your choice of shredded cheese—I recommend Monterey Jack and cheddar for the best melt and flavor, but feel free to experiment with Queso Oaxaca or Pepper Jack for a twist.

Now it’s time to layer the ingredients to create a hearty casserole:

Layer 1: Spread half of the roasted poblano peppers evenly at the bottom of your greased casserole dish.

Layer 2: Pour half of the egg and cheese mixture over the peppers, making sure everything is well covered.

Layer 3: Add the remaining poblano peppers, and then pour the remaining egg mixture over the top.

Pop the casserole into a preheated oven and bake at 350°F (175°C) for about 40–45 minutes. The casserole is ready when it’s golden and slightly puffed up in the center.

Tip: Check the casserole after 30 minutes—if the top is browning too quickly, cover it loosely with foil and continue baking until fully set.

Once your chile relleno casserole is done, let it rest for 5–10 minutes before slicing. This helps it set and ensures you get clean slices. Plus, it lets the flavors meld together for an even better taste!

With just a few simple steps, you’ll have a delicious, comforting chile relleno casserole ready to enjoy. Whether you’re serving it for dinner or sharing it with friends at a potluck, this dish is guaranteed to be a crowd-pleaser!