Fettuccine Alfredo - cooking recipe

Ingredients

1/2 c. butter
2/3 c. cream or sour cream
1/2 c. grated Parmesan cheese
1 egg yolk, slightly beaten
12 oz. pkg. fettuccine

Preparation

Melt butter in saucepan.
Gradually stir in cream, cheese and egg. Then stir in fettuccine.
Add some Parmesan cheese on top.