Can I use different types of mushrooms?
Yes. Cremini, portobello, or a mix will work well; cremini adds earthier flavor, while portobellos create deeper color. Avoid delicate varieties like oyster or shiitake alone, as they're better combined with button mushrooms.
How do I prevent the soup from breaking or becoming grainy?
Blend the soup while still hot, and temper the cream by slowly whisking it into the hot mushroom base rather than pouring it in all at once. Avoid boiling after cream is added.
Can I make this ahead?
Yes. Prepare through blending, cool completely, then refrigerate up to 3 days. Reheat gently over low heat, stirring often. Add cream just before serving if possible.
Can I substitute heavy cream with something lighter?
Crème fraîche, Greek yogurt, or whole milk will work; use crème fraîche or yogurt 1:1, or thin whole milk with a cornstarch slurry to achieve similar body. Flavor will be lighter.
How long should I caramelize the mushrooms?
8–12 minutes over medium-high heat. They'll release liquid first, then reabsorb it as they brown and shrink by half. You should see dark fond on the pan's bottom.