Serrano Onion Salsa

Name: Serrano Onion Salsa
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Yield: about 2 cups (480 ml)
Cuisine: Latin
Ingredients: 6 tbsp extra-virgin (90 ml) Olive Oil; about 12½ onions (1400 g) Onion; 4 cloves, sliced Garlic; 10 serrano peppers (7 oz/200g), stemmed and sliced Serrano; 1 tbsp kosher (0.4 oz/12g), plus more to taste Salt

Independent adaptation of a publicly published Rick Martínez recipe. Not affiliated with, sponsored by, or endorsed by Rick Martínez.

TABLE SALSA · TACOS & GRILLED STEAK & QUESADILLAS

A table salsa for tacos & grilled steak & quesadillas.

Martínez's serrano onion salsa.

On the jar

ONION

Method: stove
Yield: about 2 cups
Ingredients: 5

Stove sauce. Cook from the recipe

Ratio

Olive Oil 90 ml

Ingredients

Olive Oil6 tbsp extra-virgin (90 ml)
Onionabout 12½ onions (1400 g)
Garlic4 cloves, sliced
Serrano10 serrano peppers (7 oz/200g), stemmed and sliced
Salt1 tbsp kosher (0.4 oz/12g), plus more to taste

Method

This sauce is cooked on the stove. The jar is for storing it, not making it.
Cook ingredients gently according to the published technique, adapted here as pantry quantities only.
Finish off heat; adjust seasoning.

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Companion jar

Serrano Onion Salsa wants a whisk and a stove. Make it from this page.

The jar carries pour-and-shake sauces. These are its closest cousins from kitchens like this one:

4 kitchens · 3 stars · 4 national awards

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Provenance

Recipe developer and former Bon Appétit senior food editor based in Mazatlán; his cookbook Mi Cocina won a 2023 James Beard award.

Originally published as Salsa de Cebolla y Serrano Caramelizado.

Adapted from a recipe published by Rick Martínez in Salsa Daddy (Clarkson Potter 2025) via The Province authorized reprint.

FAQ

Can this go in a shake jar?

No. This one needs a blender or stove, so make it from this page. Jars only carry pour-and-shake sauces. Its companion jar is below.

What do the quantities mean?

This page lists the published recipe in household units (with metric in parentheses). On a jar, the printed lines, counts, and QR guide carry the jar-batch amounts. Follow the jar or this page, not a mix of both. Amounts in the jar’s ADD row are rounded to the nearest common spoon measure (T = tablespoon, t = teaspoon) so they can be read off the glass.

Where did this recipe come from?

Adapted from Salsa Daddy (Clarkson Potter 2025) via The Province authorized reprint (published as “Salsa de Cebolla y Serrano Caramelizado”). Full citation lives in Provenance.

Companion jar