Step 1

Coarsely grate the potatoes and onion. Place into a colander in the sink and allow to drain of excess liquid for about 30 minutes. Use a paper towel to press out any excess liquid as needed.

Step 2

To a large bowl, add potatoes, onion, flour, egg, salt, and pepper. Mix thoroughly.

Step 3

Heat a 12-inch skillet over medium-low heat with 1 Tablespoon of oil and 1 Tablespoon butter. Use a 1/4 cup measurement to scoop potato mixture and form into loose patties about 1/4 inch in thickness. Work in batches to fry in the skillet 4 minutes on each side until golden brown.

Step 4

Repeat the process in three batches.

Step 5

To keep previous batches warm and crunchy, place on a baking sheet in an oven set to warm or 200F.