Cook/ Easy Weeknight/ Weekend Feasting

Red Onion Gravy From Scratch

June 4, 2017 (Last Updated: February 28, 2019)

Last Updated on February 28, 2019 by Slow The Cook Down

This week I’m going to share with you how to make one of my favourite go to recipes to pump some extra flavour into your meals.  This red onion gravy is the traditional accompaniment to sausage and mash or toad in the hole, but you can also mix it up and use it in place of a smooth gravy on your Sunday roast or Christmas dinner – it will do wonders for your pork chops and roast potatoes.

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This onion gravy is a perfect accompaniment to bangers and mash, toad in the hole or a Sunday roast. Made from scratch and full of flavour. Vegetarian.

This simple onion gravy has a wonderful rich depth of favour – in my opinion it’s the best gravy recipe out there!  It uses just a handful of ingredients, most of which will already be sitting in your kitchen cupboards and doesn’t require much attention during the cook, meaning you can keep enjoying that glass of red wine!

Vegetarian and Vegan Red Onion Gravy Recipe

Strictly speaking, because I have used Worcestershire sauce in this recipe, it isn’t vegetarian and I also use butter to cook the onions so it’s not vegan.  HOWEVER…!! With a few simple swap outs you can make this 100% animal product free.  Swap the Worcestershire sauce for a tsp of marmite and just use oil to cook the onions rather than butter.

I often use a vegetable stock in onion gravy, so it’s perfect if you are catering for vegetarian and meat eaters, but you can also use beef or chicken stock if that’s what you have to hand.

Caramelised Red Onion Gravy

Because I wanted this from scratch onion gravy recipe to be as simple and easy as possible, I didn’t fully caramelise the onions, but if you have time then cook them for longer to get them nice and sweet.  If you want to make this gravy even richer, pop in a bit of red wine 😉

This onion gravy is a perfect accompaniment to bangers and mash, toad in the hole or a Sunday roast. Made from scratch and full of flavour. Vegetarian.

How to make Red Onion Gravy From Scratch

We are all so used to using gravy granules for a quick and easy gravy – me included! – but there really is no better than making your own for a full and rich flavour. It takes around 50 minutes to make onion gravy scratch, but most of that time is passive.  It’s so easy to make gravy while you are cooking your main dish.

This is a foolproof red onion gravy recipe that is packed full of delicious flavour and I’m sure it will become your go to accompaniment for your bangers and mash!

This onion gravy is a perfect accompaniment to bangers and mash, toad in the hole or a Sunday roast. Made from scratch and full of flavour. Vegetarian.

Red Onion Gravy From Scratch

The perfect accompaniment for any meal!
5 from 4 votes
Print Pin Rate
Course: Side Dish
Cuisine: American, british
Prep Time: 5 minutes
Cook Time: 45 minutes
Total Time: 50 minutes
Servings: 4 servings
Calories: 230kcal


  • 4 red onions
  • 2 garlic cloves
  • 1.75 ounces salted butter (50g)
  • 2 tbsp olive oil
  • 1 tbsp Worcestershire sauce
  • 1 tbsp demerara sugar
  • salt and pepper to taste
  • 1 tbsp plain flour
  • 2.1 cups vegetable stock (500 ml)
  • 1 small bunch thyme tied with kitchen string


  • Finely slice the onions and garlic
  • In a medium saucepan, add the butter, olive oil, Worcestershire sauce, sugar, salt  and pepper.  Put on a low heat to melt the butter 
  • Add the sliced onions and garlic, and cook for about 10 minutes until softened, stirring occasionally. 
  • Stir in the flour and cook for another couple of minutes
  • Turn down the heat as low as it will go and add the stock and thyme. Place a lid on the saucepan and leave for 30 minutes.
  • Remove the lid and keep on the heat until the gravy has reduced to your preferred consistency.


The gravy can be made ahead of time and gently reheated before serving
To make vegan / vegetarian, just use oil to cook the onions and swap Worcestershire sauce for a teaspoon of marmite.
Nutritional values are based on one of four servings.


Calories: 230kcal | Carbohydrates: 19g | Protein: 2g | Fat: 17g | Saturated Fat: 7g | Cholesterol: 27mg | Sodium: 636mg | Potassium: 225mg | Fiber: 3g | Sugar: 9g | Vitamin A: 810IU | Vitamin C: 17.2mg | Calcium: 56mg | Iron: 1.4mg
Tried this recipe? Pin it today!Mention @SlowTheCookDown or tag #SlowTheCookDown!


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  • Reply
    April 22, 2020 at 11:46 pm

    Sorry maybe I’ve had to much wine. Lol. My post should read “put the lid on for 30 min”


    • Reply
      Slow The Cook Down
      April 23, 2020 at 1:54 pm

      Ha ha, it happens to the best of us! So glad you enjoyed this Kris, thanks for taking the time to comment! 🙂

  • Reply
    April 22, 2020 at 11:42 pm

    5 stars
    I made this for my meatloaf. A-MAZING!! I love the part where you” put the old on for 30min”. That happens to be the exact time it takes I have a glass of wine. Live this gravy.

  • Reply
    September 23, 2019 at 4:40 pm

    5 stars
    Lovely gravy I added a extra tablespoon of flour as I like gravy thick. Will definitely make it again

    • Reply
      Slow The Cook Down
      September 23, 2019 at 5:50 pm

      Hi Sam, so glad you enjoyed it, I’ve been making this for years!

  • Reply
    Michelle - Giraffes Can Bake
    July 6, 2017 at 8:33 am

    5 stars
    Is it bad that I just want to drink this gravy?!

    • Reply
      Slow The Cook Down
      July 16, 2017 at 7:12 pm


  • Reply
    June 27, 2017 at 3:20 pm

    5 stars
    I have a confession… I could eat gravy with EVERYTHING it’s one of my weaknesses! And adding onions to them? I might just grab a spoon… this looks amazing!

    • Reply
      Slow The Cook Down
      July 16, 2017 at 7:13 pm

      I need gravy on everything too! Let me know if you give this one a go!

  • Reply
    June 10, 2017 at 7:39 pm

    This looks absolutely amazing! Next time I make a roast, this will definitely be accompanying it!

  • Reply
    Julie is Hostess At Heart
    June 8, 2017 at 3:22 am

    I love a great gravy and homemade is the only way to go. This one sounds amazing and perfect for a Sunday dinner.

  • Reply
    Debbie Pierce
    June 4, 2017 at 1:36 pm

    The onion gravy looks wonderful. Think that I will try the recipe this week. Thanks for sharing.

    • Reply
      Slow The Cook Down
      June 4, 2017 at 1:59 pm

      Hi Debbie, you won’t be disappointed! Its so easy to make and super tasty. Let me know how you get on!

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