What mushrooms are best for stroganoff?
Cremini are my everyday pick because they brown nicely and have a deeper, more robust mushroom flavor than white buttons. For extra depth, use a mix: cremini plus shiitake, oyster, or a small handful of rehydrated porcini (and use some of the soaking liquid in the sauce, but strain it through a coffee filter or paper towel first so you do not get grit).
How do I keep sour cream from curdling?
Two rules: lower the heat and temper if needed. Turn the burner off before adding sour cream. If your pan is screaming hot, stir a spoonful of warm sauce into the sour cream in a bowl first, then add it back to the pan. Also, full-fat sour cream is a little more forgiving than low-fat.
Can I make it vegan?
Yes. Use olive oil instead of butter, swap broth for vegetable broth, and replace sour cream with a thick unsweetened plant-based sour cream or plain cashew yogurt. Also, egg noodles are not vegan, so use an egg-free pasta instead. Make sure your Worcestershire is vegan (traditional versions contain anchovies). Add an extra squeeze of lemon at the end to keep that classic tang.
Why is my sauce too thin or too thick?
Too thin: simmer 2 to 4 minutes longer to reduce, or mix 1 teaspoon cornstarch with 1 tablespoon cold water and stir in while simmering. Too thick: loosen with a splash of broth or pasta water until it coats the noodles the way you like.
What can I serve it over besides egg noodles?
Mashed potatoes, rice, buttered spaetzle, polenta, or even toasted sourdough if you are going for a gravy-on-toast situation.