If using the oven method, preheat the oven to 425°F (220°C) and set two oven racks in the centermost positions.: The oven needs to be very hot before you place the latkes inside so the oil and pan surface begin crisping immediately; you should feel intense radiant heat when you open the door. The sensation of hot air pouring out is normal and tells you the oven is at temperature. This high heat replicates the surface sear you get from frying, helping the bottoms brown quickly, which preserves interior moisture. A common mistake is underheating, which makes the latkes soggy rather than crisp, so always allow full preheat time.
Make the Batter: Peel the potatoes, then coarsely grate them with the onion together using a food processor fitted with the grating blade—or by hand, using a box grater. Place the potato and onion mixture in a fine sieve over the sink or a large bowl and press down firmly with a wad of paper towels or a clean dishcloth to wring out excess moisture. Stir and repeat a few times with fresh paper towels until the liquid is mostly drained. Beat the eggs in a large bowl. Add the potato and onion mixture, salt, baking powder, and flour. Mix until evenly combined.: Peel the potatoes, then coarsely grate them with the onion together using a food processor fitted with the grating blade—or by hand, using a box grater : The sound of the grater and the sight of pale shreds indicate progress; when using a food processor the motion is faster and you will notice a wet, starchy slurry forming. This slurry is normal, because potatoes release a lot of moisture and starch when grated, which you will address in the next steps. Rushing this step leads to excess water and limp latkes, so take your time to get consistent shreds for even cooking.
Fry the Latkes: Stovetop Method: In a large cast iron or nonstick skillet over medium-high heat, heat about 1/4 cup (60 ml) of oil. Once the oil is hot and shimmering, drop mounds of batter (about 3 tablespoons) into the hot pan (the batter should sizzle when you drop it in). Flatten the mounds slightly with a spatula. Reduce the heat to medium and cook until the bottom of the latkes are golden brown and crispy, about 5 minutes. Flip and cook until the second side is golden, another 4 to 5 minutes, adjusting the heat as necessary. Transfer the latkes to a baking sheet lined with paper towels to drain. Repeat with the remaining batter, adding more oil as necessary. Oven Method: Fill two heavy nonstick rimmed baking sheets with 1/2 cup oil each (see note). Place the pans in the oven for 10 minutes to heat the oil. Wearing oven mitts, very carefully remove the pans from the oven. Drop mounds of batter (about 3 tablespoons) onto the baking sheets, spacing the latkes about 1 1/2 inches (4 cm) apart. Using the back of a spoon, press down on the latkes to flatten just slightly. Bake for 15 to 20 minutes, or until the bottoms are crisp and golden. Carefully remove the pans from oven and flip the latkes (tongs are the best tool as a spatula may cause oil to splatter). Place the pans back in the oven and cook until the latkes are crisp and golden brown all over, about 10 minutes more. Remove the pans from the oven and transfer the latkes to a baking sheet lined with paper towels.: When you press and see cloudy, starchy water release, you know you are removing what would otherwise steam the latkes. The tactile feedback is useful, the shreds should feel much drier after a few presses. If water remains, repeat the process with fresh towels; too much retained moisture is the primary reason latkes will not crisp.
Serve the latkes warm with sour cream and applesauce.: The mixture should end up damp but not dripping, and the shredded pieces should clump slightly when squeezed. This residual dampness is just right because the eggs and flour will bind it, while the oil will create the crust. The mistake to avoid here is over drying which can make the latkes dry and mealy rather than tender.
Beat the eggs in a large bowl: You will notice the eggs become frothy and pale when beaten, which incorporates air and helps a lighter interior. That gentle foam is an indicator you beat them enough. Under beating gives a dense texture, but over beating is not a real risk here; just aim for uniformity so the binder distributes evenly throughout the shredded mixture.
Add the potato and onion mixture, salt, baking powder, and flour: When you combine them, the batter will look rustic and slightly shaggy; the flour will absorb moisture and the baking powder will start working as it encounters liquids. Visually, you want no pools of liquid and a cohesive batter that holds together when scooped. If it seems too loose, the remedy is gentle pressing to remove more liquid, not more flour, which can lead to heavy latkes.
Mix until evenly combined: The sound of the spoon moving through the mixture will change from a watery slosh to a thicker scrape. The why here is simple, even mixing ensures each bite browns consistently and the seasoning is uniform. A common error is overmixing vigorously, which can break down the shreds too much; stir until just combined for the best texture.
Fry the Latkes: Stovetop Method: In a large cast iron or nonstick skillet over medium-high heat, heat about 1/4 cup (60 ml) of oil : Watch the oil until it shimmers and gives off a faint ripple motion, that sheen tells you it is hot enough. Carefully test with a tiny pinch of batter; it should sizzle immediately. The sizzling sound and the quick formation of a brown edge are your cues. If the oil smokes strongly, reduce heat; smoking oil imparts a bitter flavor. Not using enough oil or starting too cold will result in greasy, underbrowned latkes.
Once the oil is hot and shimmering, drop mounds of batter (about 3 tablespoons) into the hot pan (the batter should sizzle when you drop it in): The moment the mound hits the oil you want to hear a crisp hiss; that indicates instant surface searing. Use a spoon or measuring scoop to keep sizes consistent so the cooking time is predictable. If the latkes stick, the oil was not hot enough, and if they burn quickly, it was too hot; aim for steady medium to medium-high heat to maintain control.
Flatten the mounds slightly with a spatula: Pressing them gently encourages contact with the pan so they brown evenly; you will see the edges start to darken and firm up first. The visual cue is a solid, golden rim forming around the pancake. Avoid pressing too hard which can squeeze out moisture and make them dense, and resist flipping before the edge is set or they will tear.
Reduce the heat to medium and cook until the bottom of the latkes are golden brown and crispy, about 5 minutes: Listen for a steady gentle sizzle rather than an aggressive pop; that steady sound means the interior is cooking through without burning the outside. The first side should be a deep golden color, and you will smell a roasted potato aroma. Flipping too soon causes breakage, while leaving them too long burns the crust and dries the center.
Flip and cook until the second side is golden, another 4 to 5 minutes, adjusting the heat as necessary: The second side will brown faster because the latke has already set; watch for uniform color and a firm texture when nudged with the spatula. If the centers still feel soft, reduce heat and allow a few more minutes to cook through. A common pitfall is crowding the pan which lowers the oil temperature and leads to soggy results, so fry in batches.
Transfer the latkes to a baking sheet lined with paper towels to drain: The paper towels absorb excess oil and help maintain crispness without making them greasy. Arrange them in a single layer rather than stacking, which preserves the texture. Leaving them on towels too long can steam them slightly, so transfer to a warm plate to serve once drained.
Repeat with the remaining batter, adding more oil as necessary: Each batch may need fresh hot oil to keep the temperature consistent; watch the oil sheen and the sizzle test between batches. Rotating oil and giving the pan a minute to return to temperature prevents undercooked middles. A common mistake is adding all batter at once which drops the oil temperature and results in limp latkes.
Oven Method: Fill two heavy nonstick rimmed baking sheets with 1/2 cup oil each (see note) : Place the pans in the oven for 10 minutes to heat the oil so when the batter hits the surface it begins crisping immediately. The visual cue is shimmering oil pooled in the wells of the sheets, and you will feel heat when you carefully open the oven. Using well seasoned, truly nonstick pans prevents sticking; otherwise the latkes can adhere and tear when flipped.
Wearing oven mitts, very carefully remove the pans from the oven: Hot oil will cling to the pans and can splash, so stable hands and mitts are essential. Work quickly but safely when dropping batter onto the heated oil. If oil splatters, pause and allow it to calm before continuing to avoid burns; safety matters more than speed.
Drop mounds of batter (about 3 tablespoons) onto the baking sheets, spacing the latkes about 1 1/2 inches (4 cm) apart: Even spacing promotes hot air circulation and prevents them from fusing together as they crisp. Flatten slightly with the back of a spoon so they cook evenly. Crowding results in uneven doneness and softer edges, so give them room to breathe.
Using the back of a spoon, press down on the latkes to flatten just slightly: This encourages even contact with the hot oil on the sheet so the bottoms crisp uniformly. The flattened top will brown in the second phase of baking, so resist the urge to over flatten which can dry them. A good visual is a uniform circular shape with edges that begin to pull away from the oil surface.
Bake for 15 to 20 minutes, or until the bottoms are crisp and golden: You will see the edges firm and the bottoms deepen in color; the sound changes from a faint pop to a steadier crisp as moisture leaves the latkes. If bottoms remain pale, give a few extra minutes. Opening the oven repeatedly slows cooking, so check through the oven window when possible.
Carefully remove the pans from oven and flip the latkes (tongs are the best tool as a spatula may cause oil to splatter): Use tongs to turn each latke to avoid splatter and to protect the shape. After flipping, the tops will begin to brown and any residual moisture will escape, increasing crunch. If flipping is rushed some latkes can deform, so take your time and work methodically.
Place the pans back in the oven and cook until the latkes are crisp and golden brown all over, about 10 minutes more: This final stage evens out color and ensures heat penetrates to the center. You should smell a toasty aroma and see a consistent golden tone across each latke. Overbaking will dry them, so remove once they reach that deep golden color.
Remove the pans from the oven and transfer the latkes to a baking sheet lined with paper towels: Let them rest briefly to shed excess oil, then move to a warm plate for serving. Serving immediately preserves the texture; if you must hold them, keep them in a warm oven on a rack so they stay crisp.
Serve the latkes warm with sour cream and applesauce: The contrast of hot, crisp latke with cool sour cream or sweet applesauce is classic and satisfying. Present them immediately so each bite keeps its crunch. A final mistake to avoid is stacking them while hot which steams the bottoms and softens the crust.