In a medium bowl, combine the mashed potatoes, onion, egg, flour, salt, and pepper. Mix until well combined.
Heat a large skillet over medium heat and add enough oil to lightly coat the bottom. Drop heaping tablespoons of the potato mixture into the skillet and flatten slightly with the back of a spoon.
Cook for 3-4 minutes on each side, or until golden brown. Remove from the skillet and drain on a paper towel-lined plate.
Serve hot with a dollop of sour cream.
Interesting Facts
Bramboracky are a traditional Czech dish and are often served as part of a holiday meal.
The name bramboracky comes from the Czech word for potato, 'brambor'.
Bramboracky can be eaten as a side dish or as a main course.
The traditional way to serve bramboracky is with a dollop of sour cream and a slice of ham.