Saute mushrooms in butter for about two minutes; add creme fraiche, stir, then remove from heat.
Sprinkle schnitzels with salt and pepper, and coat in flour. Fry schnitzels in butter for 3 minutes per side; remove from pan.
Add cognac, reduce; return mushrooms and schnitzels to pan, add salt and pepper to taste, and warm for a minute.
This is translated from Dutch, and so not exact, but we've made this a few times now without any issues. It's good with steamed green beans.
AllerHande 8 (2005)