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Tuna Soy Butter Pasta

By Maggie Zhu

Published on March 11, 2026

Time

30 minutes

Yield

Serves 4

Tuna Soy Butter Pasta

Ingredients

12 ounces spaghetti ½ teaspoon table salt, plus extra for cooking pasta6 tablespoons unsalted butter, divided1 onion, sliced thin4 garlic cloves, minced3 tablespoons soy sauce 1 (5-ounce) can olive oil-packed tuna, drained and flaked½ teaspoon pepper 1 tablespoon lemon juice ⅓ cup shredded nori 2 scallions, sliced thin

Before You Begin

Seek out high-quality olive oil–packed tuna for this recipe. If you can only find larger 6-ounce jars of tuna, it’s OK to use a full jar. Shredded nori seaweed can be found in well-stocked Asian grocery stores. Alternatively, you can thinly slice nori sheets into 3-inch long strips.

Instructions

  1. Bring 3 quarts water to boil in large pot. Add 12 ounces spaghetti and 1 tablespoon salt and cook, stirring occasionally, until al dente. Reserve 1½ cups pasta cooking water, then drain pasta; set aside.
  2. Melt 4 tablespoons unsalted butter in 12-inch skillet over medium-high heat. Add 1 thinly sliced onion and cook until softened, about 3 minutes. Add 4 minced garlic cloves and cook until fragrant, about 1 minute.
  3. Add 1 cup reserved pasta water and 3 tablespoons soy sauce, reduce heat to medium, and bring to simmer while stirring constantly to emulsify butter. Once simmering, stir in 1 can drained and flaked olive oil–packed tuna, ½ teaspoon pepper, and ½ teaspoon table salt. Add pasta and toss until evenly coated in sauce, about 1 minute.
  4. Remove from heat and stir in 1 tablespoon lemon juice and remaining 2 tablespoons butter until incorporated. Add remaining pasta water as needed and season with salt to taste. Serve, topping with ⅓ cup shredded nori and 2 thinly sliced scallions.
Tuna Soy Butter Pasta
Photography by Kritsada. Styling by Ashley Moore.

Tuna Soy Butter Pasta

Headshot of Maggie Zhu
By Maggie Zhu

Published on March 11, 2026

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Time

30 minutes

Yield

Serves 4

Ingredients

12 ounces spaghetti
½ teaspoon table salt, plus extra for cooking pasta
6 tablespoons unsalted butter, divided
1 onion, sliced thin
4 garlic cloves, minced
3 tablespoons soy sauce
1 (5-ounce) can olive oil-packed tuna, drained and flaked
½ teaspoon pepper
1 tablespoon lemon juice
⅓ cup shredded nori
2 scallions, sliced thin

Ingredients

12 ounces spaghetti
½ teaspoon table salt, plus extra for cooking pasta
6 tablespoons unsalted butter, divided
1 onion, sliced thin
4 garlic cloves, minced
3 tablespoons soy sauce
1 (5-ounce) can olive oil-packed tuna, drained and flaked
½ teaspoon pepper
1 tablespoon lemon juice
⅓ cup shredded nori
2 scallions, sliced thin

Ingredients

12 ounces spaghetti
½ teaspoon table salt, plus extra for cooking pasta
6 tablespoons unsalted butter, divided
1 onion, sliced thin
4 garlic cloves, minced
3 tablespoons soy sauce
1 (5-ounce) can olive oil-packed tuna, drained and flaked
½ teaspoon pepper
1 tablespoon lemon juice
⅓ cup shredded nori
2 scallions, sliced thin

Why This Recipe Works

For a supersavory spaghetti, we start with a base of sizzling onion and garlic, butter, and soy sauce—a trio that delivers umami in every bite. Flaked tuna adds rich texture and brininess, turning a common pantry ingredient into something luxurious. Finished with a splash of lemon juice for brightness, plus scallions and shredded seaweed for freshness and aroma, this is a quick, weeknight-friendly pasta dish that feels both familiar and novel.

Before You Begin

Seek out high-quality olive oil–packed tuna for this recipe. If you can only find larger 6-ounce jars of tuna, it’s OK to use a full jar. Shredded nori seaweed can be found in well-stocked Asian grocery stores. Alternatively, you can thinly slice nori sheets into 3-inch long strips.

Instructions

  1. Bring 3 quarts water to boil in large pot. Add 12 ounces spaghetti and 1 tablespoon salt and cook, stirring occasionally, until al dente. Reserve 1½ cups pasta cooking water, then drain pasta; set aside.
  2. Melt 4 tablespoons unsalted butter in 12-inch skillet over medium-high heat. Add 1 thinly sliced onion and cook until softened, about 3 minutes. Add 4 minced garlic cloves and cook until fragrant, about 1 minute.
  3. Add 1 cup reserved pasta water and 3 tablespoons soy sauce, reduce heat to medium, and bring to simmer while stirring constantly to emulsify butter. Once simmering, stir in 1 can drained and flaked olive oil–packed tuna, ½ teaspoon pepper, and ½ teaspoon table salt. Add pasta and toss until evenly coated in sauce, about 1 minute.
  4. Remove from heat and stir in 1 tablespoon lemon juice and remaining 2 tablespoons butter until incorporated. Add remaining pasta water as needed and season with salt to taste. Serve, topping with ⅓ cup shredded nori and 2 thinly sliced scallions.

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