Garlic Butter Mushrooms with Creamy Polenta and Fontina Pull

This skillet dish turns humble mushrooms into a rich, savory centerpiece. King oyster mushrooms are scored in a diamond pattern and seared in foaming garlic thyme butter until deep golden brown, then spooned over creamy polenta.

A generous layer of aged fontina melts across the top, and a shower of fresh thyme and Parmesan finishes it. The cheese pull is the dramatic payoff, stretching from the pan to the plate. It is an indulgent, satisfying dinner that comes together quickly but tastes like a restaurant special.

Mushrooms and melted cheese are a match made in heaven, and this recipe lets both shine. The king oyster mushrooms get a beautiful diamond score that helps them absorb the garlic butter and turn crispy at the edges. Cremini mushrooms add earthy depth.

Creamy polenta is the perfect canvas, soaking up all the buttery juices. Fontina melts into a glossy, stretchy layer that pulls in long ribbons. Fresh thyme and Parmesan brighten the richness. This is a one-skillet meal that feels special but is simple enough for a weeknight.

Ingredients

Why this recipe works

Scoring the king oyster mushrooms creates more surface area, which means more golden crust and more places for the garlic thyme butter to cling.

The deep sear develops a nutty, savory flavor that is the backbone of the dish. Cooking the mushrooms in a hot cast iron skillet without moving them too much ensures they brown rather than steam.

Creamy polenta provides a soft, mild base that lets the mushrooms and cheese be the stars. Fontina is an excellent melting cheese because it becomes smooth and elastic without turning greasy. The combination of textures—crispy mushroom edges, creamy polenta, and stretchy cheese—makes every bite interesting.

Notes and substitutions

King oyster mushrooms have a meaty texture and mild flavor, perfect for searing. If unavailable, portobello caps sliced thickly work well. Cremini mushrooms are simply brown button mushrooms; use them whole or halved if large.

Aged fontina has a stronger flavor than young fontina, but any fontina will melt beautifully. For a vegetarian version, ensure the cheese is vegetarian-friendly.

Instant polenta cooks in about 5 minutes and is convenient, but stone-ground polenta yields a more rustic texture and takes about 30 minutes. Use a cast iron skillet for the best sear; if you do not have one, a heavy stainless steel pan works. Fresh thyme is essential for the aromatic butter; dried thyme can be substituted but use less.

• king oyster mushrooms: portobello mushrooms, sliced thickly
• fontina cheese: young Gouda or Gruyère, both melt well
• instant polenta: stone-ground polenta (cook longer per package directions)
• fresh thyme: 1 tsp dried thyme, added with the garlic

Equipment

• Box grater
• Cast iron skillet
• Medium saucepan
• Wooden spoon
• Chef's knife
• Cutting board