Put potatoes in a large pot and cover with water. Bring to a boil and cook for 5 minutes. Drain potatoes in a colander and set aside.
In a medium bowl, mix all ingredients, except butter and potatoes, together until well combined. Shape into 8 - 1/2 inch thick patties.
In a large skillet, add 1 Tablespoon butter and bring to medium heat. Cook patties 4-5 minutes per side until browned on both sides. Remove from pan and keep warm.
Add remaining butter and potatoes to skillet. Over medium heat, cook for 5-7 minutes or until potatoes are crisp and browned.
Notes
Michelle's note: I am very excited to try this recipe as I used to eat Frikadellen when I was a girl in Germany. They were a favorite of my German friends' mothers to take along on picnics!