cooking / mains

Creamy Bucatini with Mushrooms and Pecorino

serves 3-4 · 20-25 minutes · 5 minutes hands on · easy

Why This Works

Properly browned mushrooms build deep umami, and starchy pasta water turns cream and Pecorino into a silky sauce that clings to the hollow bucatini. The cheese choice matters: Pecorino Romano melts smooth, where Gruyère's high protein content turns stringy and clumpy in cream.

Ingredients

  • Bucatini pasta (12-16 oz)
  • Champignon (button) mushrooms (16 oz, sliced thin)
  • Red onion (½, chopped)
  • Shallot (1 medium, chopped)
  • Garlic (3 cloves, chopped)
  • Heavy cream (1-1.5 cups)
  • Pecorino Romano cheese (3 cups, grated)
  • Fresh parsley (handful, chopped)
  • Salt and black pepper (to taste)
  • Butter or olive oil (for sautéing)

Method

  1. Start the pasta water. Bring a large pot of water to a boil and salt generously — it should taste like the sea. Cook the bucatini according to package directions (usually 9-11 minutes). Save 1-2 cups of pasta water before draining.
  2. Cook the aromatics. While the water heats, warm butter or olive oil in a large sauté pan over medium heat. Cook the shallot 2-3 minutes until soft and translucent, add the red onion for another 2-3 minutes, then the garlic for 30-60 seconds until fragrant (don't burn it).
  3. Add the mushrooms. Increase to medium-high and add the sliced mushrooms. Cook, stirring occasionally, until browned and their liquid has evaporated, 5-7 minutes. Season with salt and pepper.
  4. Build the cream sauce. Add 1 cup heavy cream and let it simmer and reduce slightly, 2-3 minutes. Taste and adjust seasoning.
  5. Finish the sauce. Lower the heat and add the grated Pecorino gradually, stirring constantly, reserving about ½ cup for topping. If the sauce is too thick, loosen with pasta water 2-3 tablespoons at a time.
  6. Combine and serve. Add the drained bucatini directly to the pan and toss until well coated, adding more pasta water as needed for a silky consistency. Toss in the parsley and serve immediately, topped with the reserved cheese.

Notes

  • Timing trick: start the pasta water when you begin the aromatics so everything finishes together.
  • Let the mushrooms brown properly — that's where the deep umami comes from.
  • Add cheese off high heat, stirring constantly, to prevent clumping.
  • Avoid Gruyère in cream sauces — an earlier version of this used Gruyère + Pecorino and the Gruyère congealed as the sauce cooled. Pecorino only gives a smoother, silkier sauce; Parmesan, Fontina, or mascarpone also melt cleanly.
  • Storage: best fresh — cream sauces can separate when reheated. Leftovers keep 2 days; reheat gently over low heat with a splash of cream or pasta water.