Chile Relleno (Stuffed Poblano, Egg Battered)

Chile relleno is a roasted poblano stuffed with cheese, coated in a whipped egg batter and shallow fried until the coating puffs golden, served under a thin tomato sauce. It has a reputation for being difficult, and the reputation comes almost entirely from one step: the batter sliding off in the pan. The recipe card carries the full method with USDA-calculated numbers; this page explains why it slides and what makes it stick.

Why This Recipe Works

• The steam, not the scrubbing, peels the chile. Blistering chars the thin outer skin and boils the water just beneath it. Sealed in a covered bowl, that steam keeps working and separates the skin from the flesh, so it slips off in sheets. Skip the covered rest and you end up scraping, which tears the wall you are about to stuff.
• Flour is the bridge between a wet chile and a wet batter. A peeled poblano is slick and damp, and egg batter slides straight off it. A light dusting of flour absorbs that surface moisture and gives the batter something to grip. This one step is the difference between a puffed golden coating and a naked chile in a pan of scrambled egg.
• Whipped whites make the batter puff. The air beaten into the whites expands in the hot oil and the egg protein sets around it, which is what gives the characteristic light, souffled crust. A whole egg beaten flat has no air in it and fries into a thin, heavy layer instead.

Ingredient Notes

The chiles. Poblano, which is mild, wide and thick-walled enough to hold a filling without collapsing. Anaheim works and is milder still. Pick the largest, flattest ones you can find; twisted chiles are hard to stuff and roll around in the pan.

The cheese. Monterey jack or Oaxaca, cut into thick batons rather than grated. Batons melt slowly and stay inside; grated cheese melts fast and finds its way out through the slit. Queso fresco does not melt properly and gives a crumbly, dry filling.

What the card counts. The oil is counted in full, but most of a shallow-frying panful stays in the pan rather than on the food. USDA has no entry for what a fried piece actually absorbs, and putting a figure on it would mean estimating, which this site does not do. So read the fat and calorie numbers as the ceiling rather than the plate.

The oil. Enough to come roughly halfway up the chile, and hot enough that the batter sizzles on contact. Oil that is too cool lets the batter absorb it before it sets, which is how you get a greasy, heavy relleno.

The sauce. A thin, simple tomato sauce with onion and garlic, meant to pool under the chile rather than drown it. A heavy sauce poured over the top defeats the crisp coating you just made.

The Method, In Short

Blister, steam, peel, slit and seed, stuff, flour, batter, fry, sauce. It is a project rather than a weeknight dinner, and the roasting and peeling can be done a day ahead, which cuts the day-of work roughly in half.

Handle them gently. A roasted poblano is soft and tears easily. Work with your hands rather than tongs from the peeling step onward, and lower the battered chile into the oil by its stem.

Why the Batter Slides Off

This is the common failure, and there are only three causes, all of them fixable. The chile was wet, so flour it. The batter was thin, which happens when the whites were under-whipped or when the yolks were stirred in hard enough to knock the air out, so whip to stiff peaks and fold. Or the oil was not hot enough, so the coating had time to slump before the egg protein set. You can watch which one it is: a properly battered chile in properly hot oil starts to set and puff within about ten seconds of going in, and if it is still fluid and running after that the oil needs to be hotter.

Variations

The cheese version above is the classic, and picadillo, a spiced ground beef and potato filling, is the other traditional one. In Puebla, chiles en nogada uses a picadillo with fruit under a walnut cream sauce, served in September, and it is a distinct dish rather than a variation to improvise. A baked version, where stuffed chiles go into a dish under sauce and cheese with no batter at all, is common in American home kitchens; it is easier and good, but it is not a relleno in the fried sense.

Storage and Reheating

Chiles rellenos are at their best within minutes of frying, which is when the coating is crisp. They keep two days refrigerated and reheat best in a 375F oven on a rack for about 12 minutes, which drives off some of the moisture the coating picked up in the fridge. A microwave turns the batter soft and rubbery. Roasted, peeled chiles freeze well for three months before stuffing, which is the part worth getting ahead on.

FAQ

What chile is used for chile relleno? Poblano, a mild, wide, thick-walled chile. Anaheim is a common milder substitute. Neither is very hot, so this is a mild dish.

How do I peel poblanos without tearing them? Blister the skin all over, then seal them in a covered bowl for about ten minutes so the trapped steam loosens it. The skin should then rub off with your fingers. Do not rinse them, which washes away the roasted flavour.

Why does my batter slide off? The chile was still wet, the whites were under-whipped, or the oil was not hot enough. Dust the chile with flour first, whip the whites to stiff peaks and fold gently, and get the oil hot enough that the batter sets within seconds.

Can I bake them instead of frying? You can bake stuffed chiles under sauce and cheese, and it is a good dish, but the egg batter needs hot oil to puff and set. Baked batter turns flat and pale.

What cheese should I use? Monterey jack or Oaxaca, cut into thick batons. They melt smoothly and stay put. Grated cheese escapes through the slit and queso fresco will not melt.

Can I prepare them ahead? Roast, peel and stuff them up to a day ahead and keep them covered in the fridge. Batter and fry only when you are ready to eat.

Where to Go Next

More poblano and pepper cooking is at Mexican squash recipes and vegetarian Mexican recipes, the tomato sauce here is a cousin of enchilada sauce, and the whole library starts at easy Mexican recipes at home.