Name: Hairy Bikers Onion Bhaji Recipe
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Ingredients: 1 tbsp lemon juice; 2 medium onions, finely sliced; 1 tsp granulated sugar; 2 tsp salt; 1 tsp chilli flakes; 50ml cider or red wine vinegar; 70g gram (chickpea) flour; 30g rice flour; 1 tsp baking powder; 1 tsp ground turmeric; 1 tsp ground cumin; ½ tsp ground cinnamon; 15g root ginger, peeled and grated; 3 garlic cloves, crushed or grated; 2 green chillies, finely chopped; 2 tbsp finely chopped coriander stems; 1 tbsp coconut oil, melted, or 1 tbsp coconut yoghurt; 1 tbsp lemon juice; Salt and freshly ground black pepper; Oil for deep frying

These Hairy Bikers onion bhajis are made with gram flour, rice flour, cumin, turmeric, and pickled onions for extra crunch and tang. The result is a crispy, golden snack that works perfectly as a starter or side dish. This recipe makes about 12 bhajis, serves 6, and is ready in 30 minutes.

I have tried dozens of bhaji recipes over the years and the pickled onion method in this one makes all the difference. The tang from the vinegar cuts through the richness of the frying and keeps them from tasting heavy.

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Onion Bhaji Ingredients

For the Pickled Onions:

2 medium onions, finely sliced
1 tsp granulated sugar
2 tsp salt
1 tsp chilli flakes
50ml cider or red wine vinegar

For the Batter:

70g gram (chickpea) flour
30g rice flour
1 tsp baking powder
1 tsp ground turmeric
1 tsp ground cumin
½ tsp ground cinnamon
15g root ginger, peeled and grated
3 garlic cloves, crushed or grated
2 green chillies, finely chopped
2 tbsp finely chopped coriander stems
1 tbsp coconut oil, melted, or 1 tbsp coconut yoghurt
1 tbsp lemon juice
Salt and freshly ground black pepper

For Frying:

Oil for deep frying

How To Make Onion Bhaji

Pickle the onions: In a bowl, mix the finely sliced onions with the sugar, salt, chilli flakes, and vinegar. Leave them for at least an hour, then drain well and pat dry with kitchen paper. This step softens the onions and adds a tangy kick.
Make the batter: In a large bowl, whisk together the gram flour, rice flour, baking powder, turmeric, cumin, cinnamon, grated ginger, garlic, green chillies, coriander stems, coconut oil, and lemon juice. Add just enough water to make a thick consistency like double cream.
Combine: Stir the drained pickled onions into the batter. The batter should hold the onions together without completely coating them — you should still see individual onion strands.
Heat the oil: Half-fill a large saucepan with oil and heat to 180°C. Test with a small drop of batter — it should sizzle immediately.
Fry the bhajis: Drop heaped tablespoons of the mixture into the hot oil, a few at a time. Fry for 2-3 minutes on each side until deep golden-brown and crispy. Do not overcrowd the pan.
Drain and serve: Remove with a slotted spoon and drain on kitchen paper. Serve warm with yoghurt and mango chutney. These bhajis make a great starter before a Hairy Bikers Chicken Curry.

What Is the Secret to Crispy Onion Bhajis?

Pickle the onions first: This is the real trick. Soaking the onions in vinegar, salt, and chilli flakes for an hour softens them and adds a tangy kick that stops the bhajis tasting one-dimensional.
Use rice flour in the batter: A small amount of rice flour alongside the gram flour is what gives these bhajis their extra crunch. They stay crispy even after they cool down, which most bhaji recipes struggle with.
Get the batter consistency right: Too thick and the bhajis are heavy and doughy. Too thin and they fall apart in the oil. You want double cream thickness — enough to bind the onions but not coat them completely.
Fry in small batches: Overcrowding the pan drops the oil temperature and makes the bhajis soggy. Three or four at a time is plenty.

What Goes Well on the Side?

A cooling cucumber raita is the classic pairing. Mint and coriander chutney or simple mango chutney both work well for dipping too.

For a full Indian spread, serve these alongside a Hairy Bikers Chicken Tikka Masala or a Hairy Bikers Chicken Korma with rice and naan.

Do These Stay Crispy the Next Day?

Not really — bhajis are best eaten fresh. If you do have leftovers, store them in an airtight container in the fridge for up to 3 days.

They freeze better than they fridge. Lay them flat on a tray to freeze solid, then transfer to a freezer bag. They keep for up to 2 months. Reheat from frozen in the oven at 200°C for 10-15 minutes until hot and crispy again.

Nutrition Facts

Calories: 250 kcal
Total Fat: 15g
Saturated Fat: 5g
Cholesterol: 0mg
Sodium: 400mg
Total Carbohydrate: 25g
Dietary Fiber: 4g
Sugars: 5g
Protein: 6g

Frequently Asked Questions

Can I make these bhajis vegan? Yes — this recipe is naturally vegan. The coconut oil and coconut yoghurt are both plant-based, and all the other ingredients are vegan-friendly.

What is gram flour? Gram flour (also called chickpea flour or besan) is made from ground chickpeas. It is naturally gluten-free and gives bhajis their earthy flavour and light, crispy texture. You can find it in most supermarkets in the world food aisle.

Can I make these in an air fryer? Yes. Spray the shaped bhajis with oil and cook at 200°C for 10-15 minutes, flipping halfway through. They will not be quite as crispy as deep-fried, but still very good.

What is the secret to a perfect onion bhaji? The pickled onion method and using rice flour alongside gram flour. The vinegar softens the onions and adds tang, while the rice flour keeps the outside extra crunchy.

What flour is best for onion bhajis? Gram flour (chickpea flour) is traditional and essential. Adding 30g of rice flour to the mix makes them noticeably crispier — this is the combination the Hairy Bikers use.

Can I prepare the mixture ahead of time? You can pickle the onions up to a day ahead and store them in the fridge. Make the batter and combine just before frying — the batter does not keep well.

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