Homemade Chili Onion Crunch Sauce: Easy Recipe

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This homemade Chili Onion Crunch Sauce is loaded with crispy sweet onions, crunchy sesame seeds, and a blend of smoky and spicy chilies infused in rich oil. Spoon it over eggs, noodles, rice bowls, grilled meats, roasted vegetables, pizza, avocado toast, and so much more. Once you make a batch, you'll want to keep a jar in your refrigerator at all times!

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If you’ve ever found yourself adding chili crisp to everything, you’re going to love making your own.

This Homemade Chili Onion Crunch Sauce has all of the things I love in one jar—crispy onions, smoky chili flakes, crunchy sesame seeds, and rich oil infused with incredible flavor. It’s spicy enough to wake up a meal, but not so hot that it overwhelms everything else.

The best part? It comes together with simple pantry ingredients, and once you have a jar in the refrigerator, you’ll start finding excuses to use it on just about everything.

I’ve spooned it over fried eggs, stirred it into rice bowls, added it to noodles, and even drizzled it over grilled chicken. Every bite gets a little crunch, a little heat, and a whole lot of flavor.

Why You’ll Love This Recipe

• Made with simple pantry ingredients
• Crispy onions add amazing texture
• Ready in about 35 minutes
• Easy to customize the heat level
• Keeps well in the refrigerator
• Better than many store-bought versions

What Is Chili Onion Crunch?

Think of chili onion crunch as somewhere between chili oil and chili crisp.

Instead of being mostly oil, it’s filled with crispy caramelized onions, toasted spices, and crunchy sesame seeds. Every spoonful has plenty of texture, making it just as delicious as a topping as it is a cooking ingredient.

Because you control the ingredients, you can make it exactly how you like it—more spicy, less spicy, or even a little smoky.

Ingredients You’ll Need

The ingredient list is refreshingly simple:

• avocado oil
• sweet onion
• crushed red pepper flakes
• gochugaru (Korean chili flakes)
• smoked paprika
• kosher salt
• brown sugar
• black pepper
• sesame seeds
• soy sauce

Each ingredient has an important job. The sweet onion slowly caramelizes until crisp, while the combination of crushed red pepper flakes and gochugaru creates a balanced heat that’s flavorful rather than overpowering.

The Secret Is Patience

If there’s one step you don’t want to rush, it’s cooking the onions.

Keeping the heat at medium-low allows the onions to slowly release their moisture before turning beautifully golden brown. This slow cooking develops a rich sweetness that balances the chilies and creates those irresistible crispy bits everyone loves.

It takes a little patience, but the flavor is absolutely worth it.

Ways to Use Chili Onion Crunch

Once you have a jar in your refrigerator, you’ll probably start adding it to everything.

Some of my favorite ways to use it are:

• Fried or scrambled eggs
• Avocado toast
• Grilled steak or chicken
• Rice bowls
• Stir-fried vegetables
• Ramen
• Burgers
• Pizza
• Dumplings
• Roasted potatoes
• Cottage cheese
• Noodle bowls

It’s one of those condiments that instantly makes leftovers exciting again.

Make It Your Own

One of my favorite things about homemade recipes is that they’re easy to customize.

If you’d like to experiment, here are a couple of variations I’ve been testing:

• Add sliced garlic. Stir in 2–3 thinly sliced garlic cloves during the last few minutes of cooking the onions. The garlic turns lightly crisp and adds another layer of savory flavor.
• Swap the brown sugar for coconut sugar. Coconut sugar adds subtle caramel notes while keeping the sweetness gentle. It’s a great option if you prefer using less-refined sweeteners.
• Finish with toasted sesame oil. Stirring in about 1 teaspoon of toasted sesame oil along with the soy sauce gives the finished chili crunch a richer, nuttier aroma.

I love the original recipe because it’s incredibly versatile, but these little tweaks are fun to experiment with if you want to make it your own.

Storage

Allow the chili onion crunch to cool completely before transferring it to a clean glass jar.

Store it in the refrigerator for up to 3 weeks.

The oil may firm up slightly when chilled. Simply let it sit on the counter for a few minutes and give it a stir before serving.

Frequently Asked Questions

More Homemade Sauces & Condiments You’ll Love

If you enjoy making your own pantry staples, be sure to check out:

• Sweet & Smoky Peach Chipotle BBQ Sauce
• Pico De Gallo
• Avocado Crema
• Creamy Feta Herb Dressing
• Basil Chimichurri
• Lemon Dill Sauce

Chili Onion Crunch Sauce

This homemade Chili Onion Crunch Sauce is loaded with crispy sweet onions, crunchy sesame seeds, and a blend of smoky and spicy chilies infused in rich oil. Spoon it over eggs, noodles, rice bowls, grilled meats, roasted vegetables, pizza, avocado toast, and so much more. Once you make a batch, you’ll want to keep a jar in your refrigerator at all times!

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Course: Condiment

Cuisine: Asian inspired

Diet: Vegan, Vegetarian

Keyword: Asian condiment, chili crisp recipe, chili onion crunch, chili onion oil, crispy onion chili oil, crunchy chili oil, gochugaru recipe, homemade chili crisp, homemade chili oil, spicy condiment

Prep Time: 10 minutes minutes

Cook Time: 25 minutes minutes

Total Time: 35 minutes minutes

Servings: 24

Calories: 91kcal

Equipment

• Medium saucepan
• Wooden Spoon
• Heatproof bowl
• Fine mesh strainer (optional)
• Glass jar with lid

Ingredients

• 1 cup neutral oil I like avocado oil
• 1 large sweet onion finely diced
• 3 tablespoons crushed red pepper flakes
• 1 tablespoon Korean chili flakes gochugaru
• 1 teaspoon smoked paprika
• 1 teaspoon kosher salt
• 1 teaspoon brown sugar
• ½ teaspoon freshly ground black pepper
• 1 tablespoon sesame seeds
• 1 tablespoon soy sauce or tamari

Instructions

• Heat the oil in a medium saucepan over medium-low heat. Add the diced onion and cook slowly for 20–25 minutes, stirring frequently, until the onions are deep golden brown and crispy around the edges.
• Remove the saucepan from the heat. Stir in the crushed red pepper flakes, gochugaru, smoked paprika, kosher salt, brown sugar, black pepper, and sesame seeds. The residual heat will gently toast the spices and bloom their flavors.
• Let the mixture cool for about 5 minutes, then stir in the soy sauce until well combined.
• Transfer the chili onion crunch sauce to a clean glass jar. Allow it to cool completely before sealing with the lid.
• Store in the refrigerator for up to 3 weeks.

Notes

• Cook the onions slowly—don’t rush this step. Deep golden onions create the best flavor and texture.
• For a milder version, reduce the crushed red pepper flakes to 2 tablespoons.
• Substitute tamari for a gluten-free version.
• Delicious on eggs, ramen, fried rice, dumplings, grilled chicken, steak, burgers, roasted vegetables, pizza, avocado toast, and sandwiches.
• Stir before serving if the oil separates.

Nutrition

Calories: 91kcal | Carbohydrates: 2g | Protein: 0.4g | Fat: 9g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Sodium: 162mg | Potassium: 48mg | Fiber: 1g | Sugar: 1g | Vitamin A: 437IU | Vitamin C: 1mg | Calcium: 11mg | Iron: 0.4mg

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