I haven't made them in years, but my "recipe" (such as it was!) was pretty simple.
Cut up a few potatoes (I'm sure I used brown ones, b/c that's what I always buy unless a recipe says otherwise) into whatever size/shape you like. I usually did ~finger-sized.
Soak them in cold water for 15-20 minutes, then dry them thoroughly.
Heat a couple of inches of vegetable oil in a big heavy pot. Put in potatoes in small batches.
When they turned brown, they were usually done.