How to Make Fermented Jalapeno Peppers

Fermented Jalapeno Peppers are an easy way to add a spicy and sour flavour to a meal. Lacto-fermented peppers are also more nutritious than raw Jalapenos as they feature healthful benefits such as probiotics. Our easy recipe for pickled jalapeno peppers is perfect for those canning Jalapenos for the first time.

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What is Lacto-Fermentation?

At some point, thousands of years ago, early humans learned to use the process of fermentation to enjoy its tasty results. The most familiar fermented foods, like Korean kimchi, Jewish pickles and German sauerkraut are made using lacto-fermentation.

Most people think about beer or wine when they hear the word fermentation. While specialized yeasts are used to convert sugars in grape juice or grains into alcohol, it is tiny bacteria that are responsible for lacto-fermentation. Various strains of these bacteria are naturally present on the surface of plants, especially those growing in or close to the ground such as garlic, carrots, and jalapeños.

The naturally occurring bacteria convert sugars into lactic acid. This acid is a natural preservative that inhibits the growth of harmful bacteria. Lacto-fermentation also increases and preserves the beneficial vitamin and enzyme levels, and digestibility of fermented food.

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Ingredients you'll need to prepare fermented jalapeno peppers.
Ingredients you’ll need to prepare fermented jalapeno peppers.

Why Make Fermented Jalapeno Peppers?

  • if you’re keen to try fermentation for the first time it’s best to start with an easy recipe. Fermented peppers is one of the easiest fermentation recipes you’ll find.
  • lacto-fermented vegetables are rich in beneficial bacteria, which have been proven to encourage healthy gut flora.
  • fermenting peppers allows you to naturally preserve raw garlic to enjoy over a long period of time.
  • Jalepeno peppers that have gone through the process of lacto-fermentation change their flavour profile and texture over time. Many foodies find fermented peppers to be more delicious than the more pungent raw variety.
Jalapeno peppers waiting for the fermentation process to begin.
Jalapeno peppers and garlic waiting for the fermentation process to begin.

Get Creative with Fermented Jalapeno Peppers

Lacto-fermented peppers can be used in any recipe that calls for raw jalapeno peppers. You ideally want to avoid using it in recipes that require cooking, as the heat will destroy the beneficial probiotics. Here are some of our favourite ways to use fermented peppers when cooking at home:

  • Jalapeno Butter: whip crushed fermented peppers into softened butter and spread on fresh bread.
  • Dips: fermented peppers are a great addition to your favourite dips such as hummus, guacamole, salsa and baba ghanoush.
  • Cheese and Charcuterie: add your favourite lacto-fermented vegetables to a celebratory cheese and charcuterie board.
  • Pizza and Burgers: top a homemade pizza or stuff a juicy burger with fermented peppers.
  • Mac & Cheese: top your favourite Mac & Cheese recipe with fermented peppers and fermented onions.
  • Savoury Cocktails: add a few slices of fermented Jalapeno peppers to a savoury cocktail to give it a spicy meets sour flavour.
A jar of fermented jalapeno peppers ready to enjoy after a month long fermentation.
A jar of fermented jalapeno peppers ready to enjoy after a month long fermentation.

Tips on Making Fermented Jalapeno Peppers

Our pickled Jalapeno recipe looks very easy based on the short ingredients list. Since lacto-fermentation is a science, it’s best to ensure you understand how canning hot peppers works. Here are our favourite tips and tricks when canning peppers:

  • you’ll need to purchase standard fermentation equipment which can be basic or more specialized. At the very minimum you’ll need measuring spoons, measuring cups and canning jars with a rubber seal. If you plan on fermenting often purchase this fermentation crock for large batches or these fermentation jars fitted with bubble airlock.
  • do not fill the peppers and brine all the way to the top of the jar. You want to have just enough brine to cover the Jalapenos.
  • you can speed up the fermentation process by adding a teaspoon of organic apple cider vinegar or “sauerkraut juice.”
  • ensure the peppers are always submerged under the liquid to prevent mould growth.
  • open your lid each day to burp the jar, releasing a build up of carbon dioxide. This will help you avoid an unwanted explosion in your cupboards.
  • feel free to purchase a variety of spicy peppers at the grocery store. A variety of sizes and colours adds eye-catching creativity to the finished jar.

How To Slice a Jalapeno Pepper

If you’ve never cooked with spicy peppers in your kitchen before you’ll want to follow these steps to minimize any painful accidents. Fermented peppers can be stored whole or sliced. We suggest slicing peppers into 1/4 inch rings as when you bruise a vegetables membrane it speeds up the process of lacto-fermentation.

  • Wear latex safety gloves and swimming googles to avoid irritation of your fingers and eyes.
  • Cut the stem off of each Jalapeno pepper.
  • Cut each pepper lengthwise then use a spoon to scrape the seeds and membrane out.

How to Make Fermented Jalapeno Peppers

A jar of fermented jalapeno peppers ready to enjoy after a month long fermentation.
Print Recipe
4.58 from 7 votes

Fermented Jalapeno Peppers

Fermented Jalapeno Peppers are an easy way to add a spicy and sour flavour to your meal. Lacto-fermented peppers are also more nutritious than raw Jalapenos as they feature healthful benefits such as probiotics. 
Prep Time30 minutes
Total Time1 hour
Course: Condiment
Cuisine: American
Keyword: Fermented Jalapeno, Fermented Jalapeno Peppers, Fermented Peppers, Lacto Fermented Vegetables
Servings: 1 jar
Calories: 84kcal


  • 3 cups Jalapeno Peppers sliced
  • 4 cups water
  • 2 tablespoons salt


  • Once your Jalapeno peppers are sliced, add the raw peppers to a mason jar so they are 1 inch from the top. 

  • Prepare a salt brine by dissolving salt in water. 

  • Pour brine into the mason jar until the peppers are covered. 

  • Optional: add any additional flavourings such as pickling spices or raw garlic.
  • Put the lid on the jar and store at room temperature in a dark place like your closet or cupboard.
  • Open the jar once a day to release carbon dioxide. Fermentation fans call this “burping.”

  • Continue this process for 3-4 weeks until fermentation bubbles no longer form. 

  • Move the fermented Jalapeno peppers to your fridge once fermentation has completed and enjoy for the next 3-6 months.


Serving: 1jar | Calories: 84kcal | Carbohydrates: 14.8g | Protein: 2.9g | Fat: 2.9g | Saturated Fat: 0.3g | Sodium: 19166mg | Potassium: 605mg | Fiber: 8.1g | Sugar: 6.7g | Calcium: 60mg | Iron: 5.9mg

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New to fermenting? Check out these great books and products to get you started!

Fermentation Revolution by Sebastien Bureau & David Cote: Covers everything you need to know about fermentation to start a lacto-fermentation revolution in your pantry!

The Art of Fermentation by Sandor Ellix Katz: The most comprehensive guide to do-it-yourself home fermentation ever published.

The Noma Guide to Fermentation by Rene Redzepi & David Zilber: At Noma in Copenhagen, named the world’s best restaurant, fermentation is one of the foundations behind their extraordinary menu. Read their never-before-revealed techniques to creating Noma’s extensive pantry of ferments!

Fermented Vegetables by Kirsten & Christopher Shockey: This easy-to-follow guide presents more than 120 recipes for fermenting 64 different vegetables and herbs.

If you’re ready to start fermenting and are looking to ferment beer or wine purchase this great home brewing kit!

This Easy Fermenter Kit was created to help make fermenting simple. It comes with 3 Wide Mouth Mason Jar Lids & 1 Oxygen Extraction Vacuum.

This 5L Glass Fermentation Crock + 45 recipe book set lets you make delicious, fermented favourites in an affordable design at home.

We also love this Simply Sauer Vegetable Fermentation Kit which comes with 1 oxygen pump and 4 air airlock lids. If you are planning to ferment multiple items at once, they also make this great Mason Jar Fermentation Airlock Lid Kit.

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