Fettucine - cooking recipe

Ingredients

1/2 stick butter, cut into small pieces
2 egg yolks
1/2 to 3/4 c. Parmesan cheese
1 tsp. salt
1/2 to 3/4 c. sour cream
12 oz. thin egg noodles, cooked

Preparation

Combine
first 5 ingredients and mix until creamy.
Add to cooked noodles and serve.