Asian Cooking Oils and Chilli Oils: A Practical UK Buying Guide for Every Kitchen

Asian cooking oils and chilli oils can transform noodles, dumplings, stir-fries and rice dishes with just a small spoonful. However, choosing between sesame oil, Japanese chilli oil, Sichuan chilli oil, peanut oil and onion oil is not simply a matter of selecting the most attractive label.

Some bottles are finishing oils rather than everyday cooking oils, while ready-to-use condiments may contain sesame, soya, peanuts, wheat or added salt. The right choice depends on flavour, cooking temperature, intended portion size and storage requirements.

Common buying pitfalls to avoid

1. Confusing finishing oils with cooking oils

Pure sesame oil and Sichuan pepper oil are generally used to finish dishes, add to sauces or season cold food. They are not automatically suitable as your only frying oil. A product labelled for drizzling, noodles or dipping may lose its intended aroma if exposed to prolonged high heat.

For regular stir-frying, check the usage instructions. Peanut oil, for example, is specifically described as suitable for frying, stir-frying and daily cooking. Chilli condiments are usually more useful as a finishing sauce or flavour base.

2. Assuming “chilli oil” means a particular heat level

Japanese chilli oil can be relatively gentle and aromatic, while Sichuan chilli oil or mala chilli oil may bring both heat and a numbing pepper sensation. Crispy chilli oil may focus more on texture, garlic or onion than intense heat.

The ingredient list gives a clearer indication than the product name. Look for the stated chilli percentage, Sichuan peppercorns, garlic, fried onion, peanuts and sesame. For example, Cui Hong Fragrant Spicy Red Chilli Oil lists 11.34% chillies, while Chuan Wa Zi Chilli Oil Sauce lists at least 15% chilli.

3. Ignoring allergens and storage after opening

Many Asian cooking condiments contain sesame, soya, peanuts or wheat. This is particularly important when buying a mixed chilli oil for a household with allergies or when serving food to customers.

Always check the current packaging. Several products recommend refrigeration after opening, including some sesame oils and crispy chilli oils. A large bottle may appear economical, but a smaller jar can be more practical if you only use a spoonful at a time.

Core parameters to check before purchasing

Oil type and ingredient order

A pure sesame oil should list sesame oil or sesame seeds as the sole oil ingredient. Chu Bang Fragrant Pure Sesame Oil lists sesame oil at 100%, giving it a direct roasted sesame profile for cold dishes, dipping and finishing stir-fries.

A blended sesame oil may combine sesame oil with another vegetable oil. LEE KUM KEE Blended Sesame Oil lists sesame oil, soybean oil and sesame seeds. This can provide a pronounced nutty aroma in a larger 410ml bottle, but it is different from a single-ingredient sesame oil.

For everyday cooking, consider the primary oil listed. Peanut oil can suit frying and stir-frying, whereas fragrant oils such as Sichuan pepper oil are better added near the end of cooking.

Flavour style and texture

Choose according to the dish you make most often:

• Sesame oil: nutty, roasted and aromatic; useful in dumpling dipping sauce, marinades and noodles seasoning oil.
• Japanese chilli oil: often suited to ramen, gyoza, rice and mild table seasoning.
• Sichuan chilli oil: typically combines chilli with spices and may include Sichuan peppercorns.
• Mala chilli oil: designed around chilli heat and the distinctive numbing character of Sichuan pepper.
• Crispy chilli oil: includes solid ingredients such as fried garlic, onion, seeds or chilli pieces for texture.
• Onion oil: brings savoury, sweet and roasted notes to noodles, rice, tofu and stir-fry seasoning.

Size, nutrition and serving practicality

Cooking oils are energy-dense, with the supplied sesame and peanut oils listing roughly 883–900 kcal per 100ml. This is normal for oil, but portion control still matters.

A 900ml bottle of peanut oil may suit frequent frying or a catering kitchen. An 80ml Sichuan pepper oil is more suitable for occasional use, trial cooking or keeping a concentrated flavouring oil in a small cupboard. Also check salt levels in prepared condiments: Lao Gan Ma Preserved Black Bean in Chilli Oil lists 8.0g salt per 100g, so it is best used in modest quantities alongside other seasoned ingredients.

Our Top Recommendations by cooking profile

MATCH FOR: Budget-Conscious Starters

LEE KUM KEE Blended Sesame Oil 410ml

Why This Fits Their Persona: A practical starting point for UK cooks who want one aromatic bottle for marinades, noodles, garnishing and everyday seasoning.

How It Avoids the Trap

The label identifies it as a blend, so shoppers are not left guessing whether it is pure sesame oil.

Key Advantage & Pros

410ml format; ready to use for seasoning, marinating and drizzling.

MATCH FOR: Premium Quality Seekers

Chu Bang Fragrant Pure Sesame Oil 150ml

Why This Fits Their Persona: Suits cooks who prioritise a single-ingredient sesame oil and use it mainly as a finishing touch.

How It Avoids the Trap

The ingredient list states sesame oil at 100%, avoiding confusion between pure and blended products.

Key Advantage & Pros

150ml glass bottle; suitable for cold dishes, dipping and final drizzling.

MATCH FOR: Specific Use-Case/Heavy Users

Chu Bang Extra Aroma Pure Peanut Oil 900ml

Why This Fits Their Persona: A larger format for frequent stir-frying, frying and daily cooking in busy home or catering kitchens.

How It Avoids the Trap

It is clearly listed as 100% peanut oil and intended for cooking, rather than being marketed only as a finishing condiment.

Key Advantage & Pros

900ml quantity; suitable for frying, stir-frying and daily use.

MATCH FOR: Japanese Cuisine Fans

S&B Japanese Chilli Oil (La Yu) 33mL

Why This Fits Their Persona: A compact choice for ramen, gyoza, dipping sauces and Japanese-style table seasoning where a small bottle is sufficient.

How It Avoids the Trap

The 33ml size reduces the risk of keeping an opened bottle for too long when usage is occasional.

Key Advantage & Pros

Sesame oil is the main listed ingredient; suitable for controlled, aromatic seasoning.

Using Asian oils in everyday cooking

• Add sesame oil to a dumpling dipping sauce with soy sauce, rice vinegar and spring onion.
• Stir crispy chilli oil into noodles seasoning oil, or spoon it over steamed rice.
• Use mala chilli oil with cold noodles, tofu or hot dishes when you want chilli and Sichuan pepper together.
• Add Sichuan pepper oil near the end of cooking to retain its distinctive aroma.
• Use onion oil with noodles, fried rice, tofu and stir-fry seasoning.
• Mix a chilli condiment with vinegar or soy sauce for a quick dipping sauce, checking the salt content before adding more seasoning.

Frequently asked questions

Is sesame oil suitable for frying?

It depends on the product and intended use. Pure and blended sesame oils are commonly used for seasoning, marinades and finishing. For frequent frying, choose an oil whose instructions specifically mention frying or stir-frying, such as peanut oil, and use sesame oil to finish the dish.

How long does chilli oil last after opening?

Follow the storage instructions and the best-before information on the packaging. Some products recommend refrigeration after opening and consumption within one month, while others advise keeping the container sealed in a cool, dry place. Always use the product label as the final reference.

Which chilli oil is suitable for dumplings?

Japanese chilli oil can suit gyoza and lighter dipping sauces. Sichuan chilli oil, crispy chilli oil and mala chilli oil are options for stronger chilli, garlic, sesame or pepper flavours. Check whether the product contains peanuts, sesame, soya or wheat before serving.