Step 1: Clean and Purge the Clams
This is the most critical step to avoid a gritty sauce. Place the clams in a large bowl and cover them with cold tap water. Add 2-3 tablespoons of salt and stir to dissolve. Let the clams sit in this saltwater bath for at least 30 minutes, and up to 1 hour. This encourages the clams to “breathe” and expel any sand from inside their shells. After purging, drain the clams and scrub each shell with a stiff brush under cold running water to remove any external dirt. Discard any clams that are broken or remain open.

Step 2: Cook the Linguine
Bring a large pot of water to a vigorous boil. Once boiling, season it generously with salt—it should taste as salty as the sea. This is your only opportunity to season the pasta itself. Add the linguine and cook according to package instructions, but drain it when it is very al dente, about 1-2 minutes shy of the recommended cooking time. The pasta will finish cooking in the sauce later. Crucially, before draining, reserve at least 2 cups of the starchy pasta water.

Step 3: Build the Aromatic Base
While the pasta is cooking, place a large skillet or Dutch oven (one with a tight-fitting lid) over medium heat. Add the ¼ cup of extra-virgin olive oil. Once the oil is warm, add the thinly sliced garlic and the red pepper flakes. Cook, stirring frequently, for 1-2 minutes until the garlic is fragrant and just beginning to turn a pale golden color. Do not let it brown, or it will become bitter and ruin the sauce.

Step 4: Steam the Clams
Turn the heat up to medium-high. Immediately add the purged clams to the skillet, followed by the ½ cup of white wine. The wine will sizzle and steam. Give the pan a quick stir, then cover it with the lid. Let the clams steam for 5-8 minutes. You can gently shake the pan once or twice during this process. The clams are done when their shells have popped open.

Step 5: Create the Sauce Foundation
Remove the lid. You’ll be greeted by the incredible aroma of the sea. Using tongs or a slotted spoon, transfer the opened clams to a separate bowl, leaving the delicious broth in the skillet. Discard any clams that did not open. To make the pasta easier to eat, you can remove the meat from about half of the clam shells and return the meat to the skillet, leaving the other half in their shells for a beautiful presentation. Add about two-thirds of the chopped fresh parsley to the broth in the pan and stir.

Step 6: Combine Pasta and Sauce
Using tongs, transfer the drained al dente linguine directly into the skillet with the clam broth. Add the optional 2 tablespoons of butter and about ½ cup of the reserved starchy pasta water.

Step 7: Emulsify to Perfection
Turn the heat to medium-high. Toss the pasta, broth, and butter together vigorously for 1-2 minutes. The heat, starch from the pasta water, and constant motion will work together to create a beautifully emulsified, slightly creamy sauce that clings perfectly to every strand of linguine. If the sauce looks too thick, add another splash of pasta water until it reaches a luscious, flowing consistency.

Step 8: Final Touches and Serving
Return the cooked clams (both shelled and in-shell) to the pan. Toss everything together for another 30 seconds just to heat the clams through. Turn off the heat. Stir in the remaining chopped parsley and season with freshly cracked black pepper. Taste the sauce and add a tiny pinch of salt only if absolutely necessary (the clams, clam juice, and pasta water are already salty). Serve immediately in warm bowls, finishing each serving with a final, generous drizzle of high-quality extra-virgin olive oil.