A rich and creamy mushroom sauce made with butter, olive oil, garlic, white wine, broth, and heavy cream. Finished with parmesan, and fresh thyme for the best flavor — perfect over chicken, pork chops, steak, or pasta.
Melt butter with ½ tablespoon of olive oil in a skillet over medium-high heat.
Add the sliced mushrooms and cook in a single layer until golden brown, about 4–5 minutes. Don’t stir too often.
Add the garlic cloves, salt, and pepper, and sauté for another minute.
Deglaze the pan with white wine and stir, scraping the bottom for a minute until the liquid mostly evaporates.
Stir in chicken broth (or vegetable broth), heavy cream, and parmesan cheese. Bring to a gentle simmer over medium heat — not a rapid boil — to avoid splitting the cream.
Add fresh thyme and more salt and pepper to taste.
Mix 1 teaspoon cornstarch with 1 tablespoon water and stir it into the sauce. Simmer until thickened, about a minute.
If needed, add a splash of extra broth to thin it slightly.
Notes
Don't stir too often; you want to get some good browning on those mushrooms. Any wine will do here except red wines. Any kind of mushrooms will work. I like crimini mushrooms because they are always available at my grocery store. Don't use pre-grated Parmesan. It has cornstarch it it which effects the ability to melt properly into the sauce.