Garlic Butter Pasta Recipe: Simple, Buttery Weeknight Pasta

Garlic butter pasta is the weeknight hero every cook needs: spaghetti tossed in golden, fragrant garlic butter with parmesan and parsley, glossy and savoury and ready in about 20 minutes. It uses pantry staples you almost certainly have, yet tastes like something you would happily order at a restaurant.

The whole trick is patience with the garlic and respect for the pasta water. Garlic should turn pale gold, never brown — brown garlic turns bitter fast — and a ladle of starchy pasta water emulsifies the butter into a sauce that clings to every strand instead of pooling at the bottom of the bowl.

Glossy, golden and on the table in 20 minutes — the pasta you make when the fridge looks empty.

Recipe Info

• Prep time: 10 minutes
• Cook time: 12 minutes
• Total time: 22 minutes
• Servings: 4
• Calories: ~580 kcal per serving

Spaghetti, garlic and butter — plus a few extras that turn simple into special.

Ingredients

• 400 g / 14 oz spaghetti
• 60 g / 4 tbsp unsalted butter
• 2 tbsp / 30 ml olive oil
• 6 garlic cloves, thinly sliced
• 1/2 tsp chili flakes, plus more to taste
• 50 g / 1/2 cup finely grated parmesan, plus more to serve
• 1 handful fresh flat-leaf parsley, finely chopped
• 1 tbsp / 15 ml fresh lemon juice
• 1 tsp / 5 g fine sea salt, plus more for the pasta water
• 1/2 tsp black pepper, freshly ground

Every strand coated — the pasta water is the sauce's secret weapon.

Instructions

1. Boil the pasta: Bring a large pot of well-salted water to a rolling boil and cook the spaghetti according to the package until just al dente, usually 9–11 minutes. Before draining, scoop out 250 ml / 1 cup of the starchy pasta water.
2. Melt the butter: While the pasta cooks, melt the butter with the olive oil in a large skillet over medium-low heat. The oil stops the butter browning too fast.
3. Soften the garlic: Add the sliced garlic and chili flakes and cook gently for 2–3 minutes, stirring often, until the garlic is pale gold and fragrant. Do not let it brown or it will taste bitter.
4. Toss the pasta: Drain the pasta and add it straight to the skillet with 120 ml / 1/2 cup of the reserved pasta water. Toss vigorously for 1–2 minutes so the butter and starch emulsify into a glossy sauce.
5. Add the parmesan: Take the pan off the heat, shower in the parmesan a handful at a time, tossing between additions, and loosen with splashes of pasta water until every strand is coated and shiny.
6. Finish bright: Stir in the lemon juice, most of the parsley, salt and pepper, and toss once more. Taste and adjust — it should be buttery, garlicky and just salty enough.
7. Serve immediately: Twirl into warm bowls, top with extra parmesan, the remaining parsley and a pinch more chili flakes, and serve at once while the sauce is still glossy.

Tips & Variations

• Never brown the garlic. Pale gold is the target; dark brown garlic turns bitter and will dominate the whole dish. If it browns, start the sauce again — it only takes 3 minutes.
• Salt the water generously. The pasta water seasons the pasta from the inside and becomes the sauce, so it should taste like the sea.
• Save more water than you need. A full cup of pasta water is cheap insurance — the sauce tightens as it cools, and a splash brings it back to glossy.
• Add greens. A few handfuls of baby spinach or peas tossed in with the pasta wilt in seconds and turn this into a more complete meal.
• Make it richer. An egg yolk whisked in off the heat with the parmesan gives a silky, carbonara-like gloss without any cream.
• Add protein. Pan-fried shrimp, sliced chicken or crispy chickpeas all sit happily on top of this pasta without changing the method.
• Swap the shape. Linguine, fettuccine or bucatini all work beautifully — just keep the sauce-to-pasta ratio the same and cook to al dente.

Nutrition Note

Per serving, this garlic butter pasta provides roughly 580 kcal, 16 g protein, 74 g carbohydrates and 24 g fat. It is an energy-dense comfort dish built on refined pasta and butter, so the parmesan and parsley add protein and freshness rather than balance. Adding spinach, peas or a lean protein lifts the fibre and protein and makes the plate more filling, and a smaller portion with a big salad alongside keeps the meal lighter without losing the buttery joy.

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FAQ

Why is my garlic butter sauce greasy instead of glossy?

The butter and water never emulsified. Toss vigorously with starchy pasta water off high heat, and add the parmesan gradually — that starch and cheese is what binds the sauce.

Can I use salted butter?

Yes, but reduce the added salt to taste, since the pasta water and parmesan are already salty. Unsalted butter just gives you more control.

Can I make it ahead?

It is best eaten immediately — the sauce tightens as it cools. If you must reheat, do it gently in a skillet with a splash of water until glossy again.

Is garlic butter pasta vegetarian?

Yes, as written. Use a vegetarian hard cheese in place of parmesan if you need it strictly vegetarian, since traditional parmesan uses animal rennet.

What pasta shape works best?

Long strands like spaghetti, linguine or bucatini catch the butter sauce best, but short shapes like penne work too — just toss well so every piece is coated.

Keep this garlic butter pasta in your back pocket for the nights when dinner needs to be fast, cheap and genuinely good — golden garlic, glossy butter and a shower of parmesan rarely disappoint. If you make it, tell us in the comments what you added: greens, shrimp, or nothing at all.