Creamy Polenta with Garlic Butter Mushrooms and Melted Cheese Step-by-step instructions

Before you start

Gather everything before you start the heat, because the polenta needs steady stirring and the mushrooms need your attention once they reach the pan. Trim the mushrooms, wiping them with a damp paper towel rather than soaking them. Slice the mushrooms and score the caps in a crosshatch pattern with the tip of your chef's knife. Peel and slice the shallots, mince the garlic, and strip the thyme leaves from the stems.

Grate the aged cheese on the fine side of a box grater and set aside half for stirring into the polenta and half for topping. Measure the water, milk, polenta, salt and butter, and place a whisk and a medium saucepan within reach. Setting out every element on the board turns the cooking into a calm, continuous process with no rushing at the end.

Instructions

Cook the polenta to creamy

1. 1Prepare the mushrooms and shallots
   Trim the mushrooms and slice them. Score the caps in a crosshatch pattern with the tip of a chef's knife. Peel and slice the shallots, and strip the thyme leaves from the stems. Set everything on the board as mise en place.
   Look for Mushroom caps show a neat diamond pattern and the board holds everything ready.
   Tip Keep the cut pieces dry so they brown rather than steam when they reach the pan.
2. 2Grate the aged cheese
   Grate the aged hard Italian cheese on the fine side of a box grater. Let the fine shreds fall onto a plate so they are ready to scatter over the polenta at the end.
   Look for Fine, fluffy shreds of cheese gather in a loose pile.
   Tip Grate the cheese just before serving so it melts evenly and keeps its aroma.

The polenta should be thick, smooth and glossy, with a soft, tender bite and no grainy texture when you rub a spoonful between your fingers. It should fall slowly from the spoon in a ribbon and hold its shape in a loose mound. Stir in the butter and half of the cheese off the heat and watch them melt into a golden, velvety base.

Before moving on, taste a spoonful and adjust the salt, because the aged cheese adds savory salt of its own. If the polenta looks too stiff, whisk in a splash of hot milk or water until it loosens to the right consistency. Keep it covered and warm while you finish the mushrooms, stirring it once or twice so it does not form a skin on top.

Brown the garlic butter mushrooms

3. 3Cook the polenta until creamy
   Bring the water, milk and salt to a simmer in a medium saucepan. Whisk in the polenta slowly, then reduce the heat to low. Cook, stirring often, until the polenta is thick and tender, about 30 minutes. Stir in the butter and half of the cheese off the heat.
   Look for The polenta is thick, glossy and pulls away from the sides of the pan.
   Tip Stir often at the bottom of the pan so the polenta does not scorch.
4. 4Brown the mushrooms in garlic butter
   Melt the garlic butter in the black cast-iron skillet over medium-high heat. Add the mushrooms and shallots in a single layer and let them brown without stirring for several minutes. Add the minced garlic and cook briefly until fragrant, then season with salt and pepper.
   Look for Mushrooms turn deep golden brown and the garlic smells sweet and nutty.
   Tip Give the mushrooms room in the pan so they sear instead of simmering in their own liquid.

The mushrooms should be deep golden brown on the cut and scored surfaces, with crisp edges and a rich, earthy aroma. The shallots should be soft and lightly caramelized, and the garlic should smell sweet and nutty rather than sharp. The butter should look foamy and glossy around the mushrooms, coating every piece evenly. Check that no mushrooms are still pale or wet, because any moisture left in the pan will dull the flavor. Taste one piece for seasoning and add a pinch more salt or pepper if needed. If the pan looks dry before the mushrooms are browned, add a small knob of butter and keep cooking over medium-high heat until the color develops.

Assemble and serve the dish

5. 5Serve the polenta with mushrooms
   Spoon the creamy polenta onto a board or into shallow bowls and shape it into a mound. Spoon the garlic butter mushrooms around and over it, tuck in the thyme sprigs, and scatter the remaining grated cheese on top.
   Look for The cheese melts over the warm polenta and the mushrooms look glossy and golden.
   Tip Pull the polenta apart with two forks to show the molten cheese in the center.
6. 6Finish with thyme and extra cheese
   Strip a few fresh thyme leaves over the dish and add more grated cheese around the plate. Serve while the polenta is warm and the mushrooms are still hot from the pan.
   Look for Thyme leaves are scattered across golden mushrooms and melting cheese.
   Tip Serve right away, because polenta firms up as it cools.

The polenta should be warm and spreadable, shaped into a smooth, golden oval or mound on the plate, with the mushrooms arranged around and over it. The thyme sprigs should look fresh and bright, and the cheese scattered on top should begin to melt into the hot polenta. Pull the top of the polenta apart gently with two forks and confirm that the center is molten and cheesy, not stiff. Make sure every plate gets a fair share of mushrooms and that the garlic butter pools lightly around the base. Serve immediately, because polenta thickens quickly once it leaves the heat and the mushrooms are best while still warm and crisp at the edges.

Common mistakes

The most common mistake is rushing the polenta. Adding the polenta to liquid that is not simmering, or turning the heat up too high, causes lumps and scorching on the bottom of the pan. Whisk the polenta in slowly at first so no dry clumps form, then stir often as it thickens. Another frequent error is crowding the mushrooms.

A heaped pan steams the mushrooms instead of browning them, leaving them pale and rubbery, so cook them in batches if your skillet is small. Adding the garlic too early is also a problem: minced garlic burns in hot butter within a minute and turns bitter. Finally, do not forget to season in stages. The aged cheese brings salt, so taste before adding more, and check the mushrooms before serving so the whole dish is balanced.

How to tell it’s done

The polenta is done when it is thick, smooth and tender, with no grittiness left when you taste it. Lift a spoonful: it should flow slowly and hold a soft, creamy shape rather than running off the spoon. The mushrooms are done when they are deep golden brown, their edges crisp and their centers tender, and the garlic is fragrant without any sign of burning.

Because this is a meat-free dish, no internal protein temperature applies. For the cheese, look for a glossy, fully melted layer over the warm polenta that stretches gently when pulled apart with two forks. The center should be molten and creamy throughout, which is the sign that the dish is ready to serve.