+776213 · 1083
+44 (0) 7762 131083
+(52) 56 2686 9895



Decoding the Scoville Scale:Unraveling the Heat of Your Favourite Chiles

June, 2024

By Chef Fernando Stovell


The Scoville scale, a renowned metric in the culinary world, is often invoked to articulate the potency of a diverse array of peppers, ranging from the infernal Carolina Reaper to the mild-mannered bell pepper

However, it extends beyond the realm of the extraordinary, encapsulating even the familiar faces of our kitchens, such as bell peppers and jalapeños. Let us explore the intricacies of this scale and its significance in discerning the heat profiles of these fiery botanicals.

Deciphering the Essence of the Scoville Scale

Central to the Scoville scale is the quantification of pungency, colloquially referred to as spiciness, inherent within members of the Capsicum genus, encompassing a broad spectrum of peppers and chilies. This metric hinges upon the concentration of capsaicinoids, notably capsaicin, notorious for evoking a scorching sensation upon contact with the palate or skin. Correspondingly, the Scoville Heat Units (SHU) ascend in tandem with the perceived levels of capsaicinoids.

The Mechanism of the Scoville Scale.

Conceived by the discerning mind of American pharmacist Wilbur Scoville in 1912, the Scoville scale stands as a testament to both ingenuity and precision.

Unlike mere culinary folklore, its inception was grounded in a methodical approach that would forever change how we perceive spiciness.

At its core, the Scoville scale employs a meticulous process, akin to an alchemist’s craft.

A solution is meticulously crafted, integrating samples of various chili varieties, each boasting its unique potency. Into this concoction, a sugar-water amalgam is gradually introduced. This incremental addition continues until proficient sensory evaluators, steeped in the nuances of taste, can no longer discern any semblance of heat. The resulting Scoville Heat Units (SHU) denote the extent of dilution required to nullify the fiery sensation.

Consider the benign bell pepper, with its modest 0 SHU, a mere whisper of heat compared to the incendiary Thai chili peppers, which can register between 50,000 to 100,000 units, igniting the palate with a fiery intensity. It’s a numerical testament to the sheer range of sensations nature can deliver.

What’s fascinating is the exponential nature of the scale. Peppers categorised as “mild hot” exhibit twice the SHU of their “mild” counterparts, a testament to the escalating intensity as one ventures deeper into the world of chili peppers. But the story doesn’t end there. In contemporary culinary discourse, the assessment of chili heat has transcended the confines of subjective evaluation. It has embraced the objectivity afforded by high-performance liquid chromatography. This advanced technique acts as a modern-day sorcerer’s stone, allowing for the identification and quantification of individual capsaicinoids present in desiccated and ground chili specimens.

Through this scientific lens, the Scoville scale evolves from a mere sensory experience into a nuanced exploration of chemical composition.It’s a journey that marries tradition with technology, offering new insights into one of nature’s most potent gifts—the chili pepper.

The Apex of Heat:

Unveiling the World’s Hottest Chili Pepper

In a monumental announcement in 2023,the Guinness World Records bestowed Pepper X with the coveted title of the world’s hottest chili

Cultivated by the esteemed Ed Currie, a luminary in the realm of hot peppers and the proprietor of PuckerButt Pepper Company, Pepper X boasts an unparalleled average heat level of 2.69 million Scoville Heat Units. This remarkable achievement eclipsed the erstwhile record held by the Carolina Reaper, also cultivated by Currie, which registers an average heat level of 1.57 million Scoville Heat Units. Notably, while the Dragon’s Breath chili awaits official scrutiny by the Guinness World Records, anecdotal reports attribute a formidable heat level of 2.48 million Scoville Heat Units to this cultivar.

Navigating the Scoville Scale with Poise

Though primarily serving as a point of reference, the Scoville scale offers invaluable guidance in the culinary domain. When substituting jalapeños with serrano peppers, for instance, cognisance of their divergent Scoville Heat Units is imperative to maintain the desired flavour profile. Herein lies a guide, categorising a myriad of peppers based on their Scoville Heat Units:

  • MILD (0 TO 2,000 SHU): Bell pepper, Ancho poblano, Lombardo, Anaheim, Golden Greek pepperoncini.
  • MILD HOT (2,000 TO 50,000 SHU): Jalapeño, cayenne, arbol, Fresno, serrano, tabasco, lemon drop.
  • HOT (50,000+ SHU): Thai peppers, chiltepin, Charleston, pequín, Rocoto.
  • SPICY HOT (100,000+ SHU): Scotch bonnet, Pimenta de Neyde, Jamaican yellow.
  • VERY HOT (250,000+ SHU): Habanero, Fatalii yellow, Red Devil’s Tongue.
  • REALLY HOT (500,000 + SHU): 7 Pot Yellow, 7 Pot Bubblegum, Red Savina.
  • FIERY HOT (1 MILLION+ SHU): Ghost pepper/Bhut Jolokia, 7 Pot Lucy, Naga Viper, Komodo Dragon.
  • EXTREME HOT (1.5 MILLION+ SHU): Carolina Reaper, Trinidad Moruga Scorpion, 7 Pot Dougash.

Discerning the Heat Levels of Common Chili Peppers

  • ANAHEIM: 100 to 5,000
  • JALAPEÑO: 2,000 to 8,000
  • FRESNO: 2,500 to 10,000
  • SERRANO: 10,000 to 25,000
  • CHILE DE ARBOL: 15,000 to 30,000
  • CAYENNE: 30,000 to 50,000
  • THAI CHILI PEPPERS: 50,000 to 100,000
  • HABANERO: 100,000 to 350,000
  • SCOTCH BONNET: 100,000 to 325,000
  • GHOST PEPPER: Approximately 1 million

In essence, the Scoville scale serves as an indispensable compass, guiding culinary aficionados through the intricate landscape of chili heat, enabling them to navigate with finesse and precision in their gastronomic endeavours.

Tasty Chili Peppers:

  • BELL PEPPER (CAPSICUM ANNUUM) – Known for its sweet flavour and mild heat, it’s a versatile ingredient in many dishes.
  • POBLANO PEPPER (CAPSICUM ANNUUM) – A mild chili with a rich, earthy flavour, often used in Mexican cuisine, especially in dishes like chiles rellenos.
  • BANANA PEPPER (CAPSICUM ANNUUM) – Mildly spicy with a slightly tangy flavour, commonly used in salads, sandwiches, and pickled.
  • JALAPEÑO PEPPER (CAPSICUM ANNUUM) – A medium-spicy chili with a distinct flavour, commonly used in salsas, sauces, and as a topping on nachos.
  • SERRANO PEPPER (CAPSICUM ANNUUM) – Similar in heat to jalapeños but with a brighter, more citrusy flavour, often used in fresh salsas and hot sauces.

Spicy Chili Peppers:

    Known for its intense heat and fruity flavour, it’s one of the hottest chili peppers in the world.
    Similar in heat to habaneros, with a sweeter, fruitier flavour, commonly used in Caribbean cuisine.
    One of the hottest chili peppers in the world, with a smoky, floral flavour. It’s often used sparingly in sauces and spicy dishes.
    Currently holding the Guinness World Record for the hottest chili pepper, it’s extremely hot with a fruity, sweet flavour.
    Another contender for the title of the world’s hottest chili pepper, known for its intense heat and fruity flavour

Leave a Comment