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Fruits of Capsicum annuum variety 'NuMex Big Jim', a mildly hot pepper

Big Jim pepper

Capsicum annuum ‘Big Jim’

A large, mild New Mexico chile cultivar developed in the United States for green roasting.

Photo: User:Carstor, CC BY-SA 3.0, via Wikimedia Commons

The Big Jim is a cultivar of Capsicum annuum bred in New Mexico, USA. It produces very large, thick-walled fruits that are sweet and mild when picked green. It is primarily used to make roasted green chile sauce.

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  • Developed at New Mexico State University in 1975.
  • Held the Guinness record for largest chili pepper.
  • Fruits often exceed one foot in length.
  • Mild heat: 500 to 3,000 Scoville units.
  • Primarily used for roasted green chile sauce.

What is Big Jim pepper?

The Big Jim pepper is a specific variety of the species Capsicum annuum. It belongs to the group known as New Mexico chiles. The fruit is distinctively large, often growing longer than one foot. The walls of the pepper are thick. When harvested while still green, the flesh is sweet and mild. As the fruit ripens to red, it becomes spicier. The plant produces peppers with varying heat levels, mostly sitting at the lower end of the scale.

Where does Big Jim pepper come from?

This cultivar was created in the United States, specifically in New Mexico. Development began in 1975 at New Mexico State University. Dr. Roy Nakayama led the project. He was the son of Japanese immigrants. The pepper is a hybrid. It combines local New Mexican chilies with a Peruvian pepper variety. The name honors Jim Lytle, who worked on the project. It previously held a Guinness World Record for size.

What does Big Jim pepper taste like?

The taste profile depends heavily on the stage of harvest. Green Big Jim peppers are characterized by a sweet flavor with very low heat. They typically register between 500 and 3,000 Scoville Heat Units. This places them in the mild category. As they turn red, the heat increases. The heritage version retains a traditional New Mexico green chile flavor. It is described as having more depth than modern commercial versions.

How Big Jim pepper is grown and processed

Farmers grow this pepper extensively in New Mexico. It was developed to offer larger harvests. The plants produce fruit that is cheaper to yield than older varieties. Peppers are usually picked while green. The fruit has thick walls. This structure makes it suitable for processing. The heritage strain was revived from cryogenically stored seeds. It offers higher yields and longer fruit than the standard type.

Big Jim pepper, drawn

The spice green and red, drawn as a ring with a pile of the ground spice. Drawn from this page, not a photograph of one lot.
Heat: Mild 1 on a 0 to 5 scale, informed by Scoville heat units. Pungency is not the same as flavour: many spices have none.
A ring: peppercorns and other round berries, tipped from the jar and counted by the spoon.
fruit
Part used What of the plant goes into the jar: Capsicum annuum ‘Big Jim’.

How Big Jim pepper is used

Cooking with this pepper focuses almost entirely on green chile production. The thick walls hold up well to roasting. Chefs roast the green peppers to create sauces. These sauces are central to New Mexican cuisine. The ripe red form is rarely used. The large size allows for efficient chopping and blending into pastes.

Big Jim pepper in the world's kitchens

New Mexican cuisine relies heavily on this cultivar. It is the standard for green chile preparation. The pepper defines the regional flavor profile. Other cuisines do not typically use this specific variety. Its unique size and mild heat suit the local culinary traditions perfectly.

At a glance: where it turns up

Big Jim pepper at celebrations

No specific festivals or celebrations are linked to this cultivar.

Traditional and medicinal use

Traditional uses focus on its culinary role. There are no documented medicinal applications in the provided sources.

Buying and storing Big Jim pepper

Seeds can be stored cryogenically. The NuMex Heritage Big Jim was revived from frozen seeds kept in the National Plant Germplasm System. Fresh peppers should be roasted and processed quickly to maintain quality.

What to use instead of Big Jim pepper

Other New Mexico chile cultivars may be used. However, few match the specific size and mild sweetness of the Big Jim. The heritage version is a closer substitute for traditional flavors than modern commercial types.

The trade in Big Jim pepper

The cultivar was developed to meet increasing demand. It offered larger and cheaper harvests. Seeds were deposited in national systems for preservation. The heritage variety was reintroduced to address complaints about flavor loss in modern agriculture.

Meal

Roasted green chile sauce appears across many meals. It is common at lunch and dinner. It serves as a condiment or ingredient in stews. It is also found in snacks and street food contexts within the region. The sauce adds moisture and flavor to everyday dishes.

Questions people ask about Big Jim pepper

Where does the Big Jim pepper come from?

It was developed in New Mexico, USA, at New Mexico State University in 1975. It is a hybrid of local New Mexican chilies and a Peruvian pepper variety.

How hot is a Big Jim pepper?

It is considered mild. When green, it ranges from 500 to 3,000 Scoville Heat Units. The heat increases slightly if left to ripen fully red.

What does the Big Jim pepper taste like?

Green peppers are sweet and mild. They have a thick wall and a traditional New Mexico green chile flavor, especially in the heritage variety.

How is the Big Jim pepper used in cooking?

It is almost exclusively used to produce roasted green chile. The thick walls make it ideal for roasting and blending into sauces for New Mexican dishes.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Big Jim pepper", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryMasala rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. Names, strengths and customs differ from one grower, kitchen or shop to the next. Traditional and medicinal uses are described as tradition, never as medical advice, and none of this is a substitute for a doctor. If something is wrong, tell us. Last refreshed 2026-10-04.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

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