Gravy is such a staple on a roast dinner isn’t it but it can also be quite high in calories so I set about making a healthy and easy onion gravy. It is not only easy but also packed full of vegetables too.

slimming world syn free gravy in a white gravy boat
Onion gravy in white gravy boat. Delicious! Add a bit of thyme for extra flavour.

Just Average Jen is an independent blog. It is not connected with any weight loss plan. None of the contributors have received training from them or worked for them.

It is the reader’s responsibility to check nutritional values, such as Slimming World syn values and WW points. Additionally, they must check any other allowances, as any given are approximate.

It isn’t quite like a shop-bought one but I love it and so do Stuart and Ben so I thought I should share the recipe for this Unofficial Slimming World gravy! You may find it helpful for a roast dinner or even your Christmas dinner?

The best gravy for healthy meals

I truly think this Unofficial Slimming World gravy is the nicest syn free gravy I have tried. It is also vegetarian and full of speed foods so adds to the vegetables on your meal without you noticing. This makes it perfect for children who try to avoid vegetables!

This unofficial Slimming World gravy recipe is great for pouring on Gardener’s pie or roast dinners.

gardeners pie

Top tips for making this easy unofficial Slimming World gravy

If you like your gravy to be dark in colour then ensure you brown the onions well so they are almost burnt. This will give you a darker colour gravy.

I prefer this made with red onions as they have a nicer caramelised flavour but whichever you use it will be tasty. Red onions also help to make it darker in colour.

Can you use frozen onions to make this gravy

Using frozen onions is a great time saver. Frozen onions will not brown as well so the gravy will be lighter in colour. This however is an easy quick way of making it.

Slimming world syn free gravy in gravy boat

Making gravy in a soup maker

I sometimes make this Unofficial Slimming World syn free gravy in a soup maker. It does not brown the onions as well so it will be light in colour but still tasty.

Just pop all the ingredients in the soup maker and set it to smooth. Remember as nothing evaporates you may need a little less water.

Freezing this unofficial Slimming World gravy

I find this onion gravy freezes really well. Pop it into a freezer-proof tub and freeze in quantities you know you will use to ensure you do not waste any.

Why you need vegetables to lose weight

Everyone knows vegetables are good for you, don’t they? They are healthy and filling for very few calories!

The best vegetables are those with low-calorie density.

This means if you eat 100g of spinach, for example, it is just 23 calories and 100g of crisps, which would be just as filling, is around 536 calories!

Find more tips about the best vegetables for weight loss.

Meals with this homemade gravy

Gardeners pie

Sunday roast or Christmas dinner

Cheesy leek and potato pie

Shepherds Pie

KFC gravy alternative

If you are looking for a gravy more like the KFC gravy then check out my KFC fakeaway recipes for the perfect gravy! It involves some sauce mix you can buy from B&M!

Eating this gravy on other diets

If you follow Weight Watchers (WW), Noom or any other weight loss plan you can usually count the ingredients within this recipe in your allowances. It is of course important to check yourself any plan you follow and remember all nutritional information and ingredients are found in the recipe card below.

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I have a lot of weight loss guides and support if you want to exercise including if you have a condition like fibromyalgia.

Have a good look around and see how I can help you achieve your weight loss goals. Request my free resources to get you started too!

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Unofficial Slimming World syn free Gravy Recipe

  • Author: JustAverageJen
  • Prep Time: 5 Minutes
  • Cook Time: 25 Minutes
  • Total Time: 30 minutes
  • Yield: 8 portions 1x
  • Category: Side dish
  • Method: Stove top, hob
  • Cuisine: English
  • Diet: Low Calorie


This unofficial Slimming World syn free gravy made with onions and full of speed foods so perfect for the Slimming World diet



1 kg onions peeled and sliced

5 cloves Garlic (sliced)

400 ml Vegetable Stock Amount you use depends on preferred consistancy

Low-Calorie Cooking Spray

1 TSP Fresh thyme optional


Spray a large frying pan with the low calorie cooking spray and place over medium heat
Gently fry the onions and garlic for around 20-25 minutes until browning well, ideally so they look like the kind of well cooked onions you would have on a burger or hot dog!
Blend the onions and with 100ml of the stock and then add more stock until you reach your desired consistency.
Add fresh thyme if using to the gravy and warm through until hot.
Serve immediately or cool and refrigerate or freeze until needed then reheat thoroughly.

Keywords: Slimming World, syn free, gravy, sunday dinner, Christmas dinner,

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