Chili Oil Garlic Butter Pasta

Why You’ll Love This Recipe

Bold layered flavor — caramelized onions, garlic confit, chili oil, soy sauce, and honey all build on each other for a sauce that tastes complex but isn’t complicated.

Fully customizable heat — add chili oil early for mellow warmth or drizzle more on top at the end for a real kick.

Garlic confit butter is the secret — it gives the sauce a deep, rounded, almost sweet garlic flavor you can’t get from raw garlic.

Weeknight friendly — the garlic confit butter keeps in the fridge for two weeks, so once you make a batch this comes together fast.

Vegetarian and endlessly riffable — add shrimp, chicken, or crispy tofu, or keep it as is.

Chili Oil Garlic Butter Pasta: The Sauce That Has Everything

This pasta came out of my obsession with building sauces that have every flavor note — sweet, savory, spicy, rich, and bright all at once. The base is caramelized onions, which take patience but give you this deep, jammy sweetness that makes the whole sauce feel grounded. Into that goes garlic confit butter, which is just garlic slow-cooked in olive oil until it’s soft and mellow, then blended into softened butter. It sounds fancy but it’s mostly hands-off and the butter keeps in the fridge for two weeks so you can use it in everything. Then chili oil for heat, soy sauce for umami depth, honey to balance the spice, and a pour of heavy cream to tie it all together into something glossy and sauce-y. Parmesan goes in at the end off the heat so it melts smoothly into the cream rather than clumping. The result is a pasta sauce that genuinely has no weak spots — every bite is a little different depending on which flavor hits first.

Garlic Confit Butter

½ cup olive oil, enough to cover the cloves

For the Pasta

200g pasta of choice

6 tbsp garlic confit butter (from above)

The Garlic Confit Butter

Garlic confit is the move for this sauce. When you cook garlic slowly in oil at a low temperature — just barely bubbling, around 195–205°F — it loses all of its sharpness and becomes soft, sweet, and almost nutty. Blended into softened butter it becomes this incredible compound butter you can use in pasta, on bread, stirred into mashed potatoes, or anywhere you’d normally use garlic. It keeps in the fridge for up to two weeks and makes this pasta come together so much faster once you have a batch ready. If you’re short on time, minced garlic sautéed in butter works too — the sauce will still be delicious, just with a sharper garlic flavor rather than the mellow sweetness the confit gives you.

Quick garlic peeling hack: Break apart the cloves from the bulb with the skins still on. Place them in a bowl and pour boiling water over them. Let them sit for one minute, then drain. The skins slip right off with almost no effort.

The Caramelized Onion Base

Don’t rush the onions. This is the most important step in the recipe and the one most people cut short. Low and slow over medium-low heat, stirring often, for a full 10 to 15 minutes until they’re deep golden, soft, and jammy. They’ll look like too much at first and shrink down to almost nothing — that’s exactly right. That sweetness is the foundation the whole sauce is built on and it’s what keeps the chili oil and soy sauce from tasting one-dimensional. If your onions are only lightly golden after 5 minutes, turn the heat down and keep going.

How To Make Chili Oil Garlic Butter Pasta

Confit the garlic: Place the peeled garlic cloves in a small saucepan and cover completely with olive oil. Cook over the lowest heat possible — the oil should just barely bubble gently, around 195–205°F. Cook for 20 to 30 minutes until the cloves are completely soft and lightly golden. Remove from heat and let cool slightly.

Make the butter: Drain the garlic cloves from the oil and reserve the garlic-infused oil for cooking the onions. Blend the softened confit garlic with the softened butter until completely smooth. Transfer to a jar and store in the fridge for up to 2 weeks.

Cook the pasta: Bring a large pot of well-salted water to a boil. Cook the pasta until just shy of al dente — it will finish cooking in the sauce. Reserve at least ½ cup of pasta water before draining.

Caramelize the onions: Heat a drizzle of the reserved garlic oil in a large pan over medium-low heat. Add the thinly sliced onion and cook slowly, stirring often, for 10 to 15 minutes until deep golden, soft, and sweet. Don’t rush this step — the caramelized onions are the flavor base of the whole sauce.

Add the chili oil: Stir the chili oil into the onions and let it cook for 30 to 60 seconds over medium-low heat so the chili blooms in the oil and the heat becomes mellow and fragrant rather than sharp.

Melt in the garlic butter: Add 6 tablespoons of garlic confit butter and let it melt fully into the onions, stirring gently. Keep the heat gentle — too high and the butter will separate rather than emulsify into the sauce.

Build the sauce: Stir in the soy sauce and honey. Lower the heat to low, pour in the heavy cream, and stir until smooth. Let it simmer gently for 2 to 3 minutes — don’t let it boil or the cream can break.

Add the parmesan: With the heat still on low, sprinkle the grated parmesan directly into the cream sauce and stir until fully melted and the sauce looks glossy and slightly thickened.

Toss the pasta: Add the drained pasta to the pan with a splash of pasta water. Toss vigorously over low heat until the sauce clings to every noodle. Add more pasta water a little at a time if the sauce is too thick.

Finish and serve: Stir in the chopped parsley. Serve immediately with extra chili oil drizzled on top and more parmesan.

Storage and Reheating

Refrigerator: Store leftover pasta in an airtight container for up to 3 days.

Reheating: Add a splash of water or cream to a pan over low heat and toss the pasta in it until warmed through. The sauce will come back together as it heats. Avoid microwaving if possible — it can make the cream sauce grainy.

Garlic confit butter: Stores separately in the fridge for up to 2 weeks. Use it on toast, in mashed potatoes, tossed with roasted vegetables, or anywhere you’d use garlic. I love using garlic confit butter because it gives the sauce a rich, rounded, almost sweet garlic depth that you can’t get from raw garlic. But if you’re tight on time, don’t worry — just sauté a few minced cloves in oil or butter and follow the rest of the recipe as written. It’ll still be delicious.