For the sauce:
Make broad noodles, boil and serve with melted butter spread over the noodles and this sauce:
Brown butter in the skillet, add flour, then liquor of mushrooms, salt and pepper. When smooth, add mushrooms. Let boil and serve in a separate dish. When serving, a spoon of mushrooms is to be put over each portion of noodles.
The International Jewish Cook Book (1919).