Combine potato, onion, crushed crackers, eggs, salt, and pepper together in a large bowl.
Heat ¼ inch oil in a heavy skillet over medium-high heat.
Drop spoonfuls of potato mixture, first pressing mixture against side of the bowl to remove excess liquid, into hot oil; slightly flatten latkes with the back of a spoon to make an even thickness.
Cook in batches until browned and crisp, 3 to 5 minutes per side. Drain latkes on a paper towel-lined plate.
