Slow-Cooker Seafood Fra Diavolo Linguine

This slow-cooker seafood Fra Diavolo brings the bold, fiery flavors of Italian coastal cooking to your kitchen with minimal effort. Tender shrimp, calamari rings, and mussels are gently poached in a rich San Marzano tomato sauce spiked with garlic, red wine, and Calabrian chili flakes. The linguine cooks right in the sauce, soaking up every drop of the spicy goodness.

Fra Diavolo, meaning 'brother devil,' is a classic Italian-American sauce known for its spicy kick. Traditionally made with tomatoes, garlic, and hot peppers, it's often paired with seafood.

This version simplifies the process by using a slow cooker: the sauce simmers for hours to develop depth, then the seafood and pasta are added at the end for a quick, fuss-free finish. The result is a restaurant-quality dish that feels special enough for a holiday feast yet easy enough for a weeknight.

Ingredients

Why this recipe works

Slow cooking the sauce for three hours allows the flavors of the tomatoes, garlic, wine, and chili flakes to meld and deepen, creating a complex, robust base that you just can't get from a quick stovetop simmer.

The low heat gently concentrates the sauce without scorching it, and the olive oil helps carry the fat-soluble flavors in the chili and garlic, making the sauce silkier and more aromatic.

Adding the seafood and pasta in the last 15 minutes ensures that the delicate shrimp, calamari, and mussels stay tender and never overcook. The linguine absorbs some of the sauce as it cooks, so every strand is infused with the spicy tomato flavor.

This one-pot approach minimizes cleanup and lets the pasta and seafood cook together, so the starches from the pasta help thicken the sauce naturally.

Notes and substitutions

Use high-quality crushed San Marzano tomatoes for the best flavor — they're sweeter and less acidic than regular canned tomatoes. If you can't find them, any good brand of crushed tomatoes will work.

The dry red wine adds depth; choose something you'd drink, like a Chianti or Sangiovese. Calabrian chili flakes bring a fruity heat that's distinct from standard red pepper flakes, but you can substitute regular crushed red pepper to taste.

For the seafood, look for fresh or frozen raw shrimp (peeled and deveined), calamari rings, and mussels. If using frozen, thaw them completely before adding. Clean the mussels by scrubbing the shells and removing the beards. If any mussels are open before cooking, tap them — if they don't close, discard them. After cooking, discard any that remain closed.

• Calabrian chili flakes: Crushed red pepper flakes (use 1/2 to 1 tsp, to taste)
• dry red wine: Seafood or vegetable broth (omit alcohol, add 1 tsp red wine vinegar for acidity)
• linguine: Spaghetti, fettuccine, or another long pasta

Equipment

• Slow cooker (6-quart or larger)
• Wooden spoon
• Measuring cups and spoons
• Chef's knife
• Cutting board