Kitchen School

Every fried food, from West African akara to Palauan ulkoy to Central Asian chak-chak, depends on one thing above all: oil hot enough to crisp the surface fast, but not so hot it burns before the inside cooks. Around 350 to 375F is the sweet spot for most things. Too cool, and the food sits in the oil and drinks it up, turning heavy and greasy; too hot, and the outside darkens and burns while the center stays raw. A cheap clip-on thermometer takes all the guesswork out, and once you understand this single principle, most fried recipes suddenly make sense.

No thermometer is fine, because the oil will tell you. Drop in a small cube of bread or a little of your batter: it should sizzle steadily and rise to the surface within a second or two, browning in about a minute. If it sinks and just sits there, the oil is too cool, so wait; if it darkens almost instantly and the oil is shimmering or wisping smoke, it is too hot, so pull the pan off the heat for a moment. Keep testing between batches, because oil temperature drifts up between batches and drops the instant you add cold food.

The biggest home-frying mistake is crowding the pan. Every piece of cold food you add cools the oil down, so a packed pan drops well below frying temperature and everything steams and goes greasy instead of crisping. Fry just a few pieces at a time, let the oil climb back up to temperature between batches, and keep finished pieces warm on a rack in a low oven. Drain on a wire rack rather than paper towels where possible, because paper traps steam underneath and softens the crust, and salt fried food the moment it comes out while the surface is still hot enough to grab the seasoning.

Hot oil deserves respect, so treat it carefully. Use a deep, heavy, stable pan filled no more than a third to halfway, so it cannot boil over when you add food, and never leave hot oil unattended on the stove. Pat wet food dry before it goes in, because water hitting hot oil spits violently. Lower food in gently and away from you so it cannot splash toward you. If oil ever catches fire, never throw water on it, which turns it into a fireball; turn off the heat and smother the flames with a metal lid or a fire blanket. Let oil cool completely before you move or dispose of it.

Frying oil can be reused a few times if you look after it. Let it cool completely, then strain it through a fine sieve or coffee filter to remove the crumbs that would otherwise burn and turn it bitter, and store it in a sealed container away from light. Discard oil once it darkens, smells off or fishy, foams, or smokes at a lower temperature than it used to, all signs it has broken down. Never pour oil down the drain, where it clogs pipes; let it solidify or soak it into paper and bin it, or take larger amounts to a recycling point.