Syn Free Onion Bhajis | Slimming World

April 16, 2019
syn free onion bhajis
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An Indian takeaway without the onion bhajis is like a bucket without the spade, a wedding without the bridesmaids, Ant without Dec.

If you’re following Slimming World though or counting the calories, then at first glance it’s not good news. A couple of standard supermarket bhajis will set you back around 12 Syns, or several hundred calories, and that’s before you’ve even thought about your curry or your naan.

Thankfully, there’s another option.

These Slimming World onion bhajis are completely Syn free, and they’re also super easy to make.

Forget having to faff about with the deep fat fryer… they’re baked in the oven so aren’t laden with oil, and they’re every bit as delicious as the ones you get from a takeaway.

This is what you need to know…

syn free onion bhajis

For the full ingredients list and detailed instructions, see the recipe card at the end of this post. Make sure you check out this important information first though…

Have you joined the Slimming Violet Facebook Group? 

Before I share the onion bhaji recipe, I’d love to invite you to come over and us in the Slimming Violet Facebook group

It’s a friendly, positive community, and you’ll find tons of slimming friendly resources like meal plans, printables, and recipe inspiration. 

Click the purple button below and request access, and you’ll be approved as a member ASAP! 

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Serving your Slimming World onion bhajis

Are you familiar with the concept of a fakeaway?

It’s fairly self-explanatory really, and it involves making your favourite takeaway dishes in the comfort of your own home, whilst massively slashing the Syn and calorie values.

If you want to make your healthy lifestyle sustainable, then having a couple of decent fakeaways up your sleeve is going to really help.

You can still enjoy your favourite cuisines, without undoing your hard work, and you don’t have to feel like you’re deprived.

If you’re going to try these Slimming World onion bhajis, why not make my chicken Jalfrezi too?

syn free chicken jalfrezi

Add a portion of Bombay potatoes, and you’ve got your very own curry night that’s every bit as delicious as heading to a local restaurant.

It’s the perfect option for a Friday evening in, though it’s also an impressive feast if you’re thinking of inviting over a few friends.

curry night

Products I use when making these Syn free onion bhajis

As much as I love onion bhajis, or a portion of beautifully fluffy home cooked chips, I’ve always been petrified of the prospect of buying a deep fat fryer.

I just can’t let go of my – perhaps unfounded – fears regarding setting the kitchen on fire. Truth be told, I’m also petrified of the calories that will inevitably be involved.

For these Syn free onion bhajis, you really don’t need any specialist gear. You definitely don’t need a deep fat fryer. Just a decent baking tray, and the items that you’ll already have in your kitchen.

If you fancy grabbing some new bits and bobs to inspire your culinary experiments, here are a few products that I personally use and recommend…

The links below are affiliate links, which means that if you make a purchase, I’ll earn a small commission at no extra cost to you.

syn free onion bhajis slimming world

Syn Free Onion Bhajis

These Syn free onion bhajis are simple to make and are the perfect accompaniment for curry night. 
Prep Time5 mins
Cook Time25 mins
Total Time30 mins
Course: Side Dish
Cuisine: Indian
Servings: 4 2 bhajis per person
Calories: 125kcal


  • 1 onion very finely sliced
  • 2 red onions very finely sliced
  • 1 sweet potato grated
  • 2 eggs beaten
  • 1 tsp ground cumin
  • 1 tsp ground coriander
  • 1 tsp garam masala
  • Sea salt & freshly ground pepper
  • Low calorie cooking spray
  • Fresh coriander to serve


  • Preheat your oven to 180 degrees and spray a baking tray liberally with low calorie cooking spray. 
  • Put the onions, sweet potato, spices, and eggs into a bowl and add a generous pinch of salt and pepper. Mix well. 
    bhaji preparation
  • Using your hands, divide the mixture into 8 bhajis and place them on the baking tray, being careful to ensure that they don't touch each other. At this stage, you might feel a little sceptical that they'll stay together and won't fall apart - don't worry, they'll be fine! 
    bhajis pre oven
  • Spray liberally with low calorie cooking spray. 
  • Bake in the oven for 25 minutes, or until they're nicely crisped. Carefully turn the bhajis over halfway through cooking, and spraying again with the low calorie cooking spray. 
  • Decorate with the fresh coriander, serve, and enjoy! 


The nutritional and Syn values provided are carefully calculated and correct at time of publication but may not always be completely accurate.
If you're serious about sticking rigidly to your plan, it's always worth doing your own calculations for extra peace of mind - and remember, we may be using different brands or variations of ingredients which can significantly impact the nutritional and Syn values! is not responsible for any loss or damage due to reliance on nutritional information provided here. is an independent and UNOFFICIAL website, and it is in no way affiliated with, endorsed by, or representative of Slimming World. I’m NOT a Slimming World consultant, nor am I trained to give advice on any aspect of the plan, and so any information provided here should never replace the guidance of your consultant.
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Calories: 125kcal

Have you tried this recipe? I’d love to see it!

Be sure to use the hashtag #slimmingviolet and tag me @slimmingviolet over on Instagram.

Oh, and before you go…

Why not pin this recipe so you can come back to it later?

syn free slimming world onion bhajis pin

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