Bring 2 quarts of water to a boil. Add noodles. Cook 8-10 Minutes. Drain. Set aside.
Heat butter in large saute pan at medium high heat. Add meatballs and heat through for about 15 minutes. Remove meatballs from pan. Keep heat on with butter still in pan.
Slowly whisk flour into the butter to create the roux. Stir until creamy and is the color of coffee with cream.
Add beef stock slowly, while continuously stirring/whisking. Keep adding until the sauce becomes silky. Be careful not to let the roux seize up. If it starts to seize up, add more liquid and stir faster. :)
**My apologies for no picture here. I was assisting this part.
Add sour cream and stir until combined well. This will lighten the color of your sauce. NOTE: The sauce will still be thin here.
Place a large pot on the stove and turn the heat up to medium high. Add the meatballs to the pot.
Pour your sauce in the pot with the meatballs and stir.
Bring to a slight boil, then reduce and simmer 20 minutes. Stir/check every 5 minutes.
Notes
This can be served with lingonberry or blackberry jam, which is the traditional way. I just don't like jam with mine.ITEMS/INGREDIENTS USED IN RECIPE - If you are interested in any of the items I may have used (or are similar to the items I used) in making this recipe, I have listed all or some of them above within the post. NOTE: These links are affiliate links of which I receive a small commission from the sale of certain item. This does not affect your price, it remains the same.