Step 1

If using the oven method, preheat the oven to 425°F and set two oven racks in the centermost positions.

Step 2

Make the Batter: Peel the potatoes, then coarsely grate them with the onion together using a food processor fitted with the steel 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.

Step 3

Stovetop Method: In a large cast iron or nonstick skillet over medium-high heat, heat about ¼ cup 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.

Step 4

Oven Method: Fill two heavy nonstick rimmed baking sheets with ½ 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 1½ inches 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.

Step 5

Serve the latkes warm with sour cream and applesauce.

Step 6

Note: If using the oven method, you'll need two heavy nonstick rimmed baking sheets. Be sure they are truly nonstick and in good shape, otherwise the latkes will stick.

Step 7

Note: Nutritional information was calculated assuming that approximately 2 tablespoons of the oil is absorbed into the latkes when frying.

Step 8

Make-Ahead/Freezer Friendly Instructions: Latkes are best served fresh from the skillet or oven, but they reheat well. Place them on a foil-lined baking sheet in a 375°F-oven for about 10 minutes, or until hot. They can also be frozen for up to three months; reheat directly from the freezer; allow a few extra minutes in the oven.