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Slow Cooker Onion Gravy

Slow Cooker Onion Gravy – Make your own rich, sticky onion gravy in your Crock Pot. Perfect with Bangers and Mash, Toad in the Hole or a tasty nut roast! Naturally vegetarian and gluten free.

We love our onion gravy here at the Kitchen Shed. It’s the perfect comfort food and so much tastier than gravy granules!

Caramelised onion gravy made from scratch is so easy and made even easier with your slow cooker. No more standing over the stove top stirring onions to stop them from sticking to the bottom of your pan.

Onions in a basket with a jug and a ladle of gravy.

All you have to do is add the onions with some butter and oil to your slow cooker. Pop on the lid and let the slow cooker work its magic.

What equipment do I need ?

  • A slow cooker or Crock Pot

What ingredients do I need ?

  • Onions – choose firm fresh onions to make a good flavoursome gravy.
  • Butter and vegetable oil – to help caramelise the onions.
  • Seasoning – I’ve used 2 teaspoons of fine sea salt and 1 teaspoon of freshly ground black pepper. If you use a low salt stock you may want to add more seasoning to taste.
  • White wine – adds flavour. The alcohol content burns off during cooking but if you prefer not to use any alcohol, add a little more stock.
  • Stock – I used Marigold Swiss Vegetable Bouillon.
  • Balsamic vinegar for flavour and colour.
  • Dijon mustard – I used Maille.
  • Fresh thyme – I used 2 teaspoons. If using dried herbs, remember to half the amount.
  • Cornflour / cornstarch mixed with a little water – to thicken the gravy.
Onions in a basket with a jug of gravy.

How to make Easy Onion Gravy

Slow Cooker Onion Gravy really is easy to make with no roux to make and hardly any stirring. The best onion gravy flavour comes from the caramelised onions. Again the slow cooker makes an easy job of it.

  • Add sliced onions along with butter, oil and seasoning to your slow cooker and leave to cook for at least six hours on low.
  • Add the rest of the ingredients and give your gravy a good stir.
  • Cook on high with the lid propped open for at least one hour. This will help keep the gravy nice and thick.

Recipe Substitutions and Additions

Slow Cooker Onion Gravy can be customised to your family’s tastes.

A gravy filled  jug and a ladle of gravy.

Onions – I’ve used brown but you can easily substitute red onions or shallots. Either will give a sweeter flavour profile to your finished gravy.


Stock – I’ve used Marigold Swiss Vegetable Bouillon for a vegetarian gravy but you can substitute your favourite stock to make beef gravy or chicken gravy.

Wine – I’ve used white wine but red wine works well, particularly with red onions.


Herbs – I’ve used fresh thyme but sage, bay or parsley make for a tasty gravy too.

Add a tablespoon of redcurrant jelly for an extra fruity sweetness. We love to add a spoon of our Elderberry and Port Jelly for an earthy sweetness.


If you want to heat things up a bit, try adding a teaspoon of horseradish sauce.

What to serve with Caramelised Onion Gravy ?

Mash – serve with a big bowl of perfect mashed potato.
Sausages – we always serve a jug of onion gravy with our homemade vegetarian sausages.
Toad in the hole
Nut Roast
Chips or fries

How long does it keep ?

Slow Cooker Onion Gravy will keep in the fridge for up to four days in a sealed container.

Can it be reheated ?

Reheat in a pan on the stovetop on a medium heat for about 5 minutes, stirring occasionally.

Can I freeze Slow Cooker Onion Gravy ?

Slow Cooker Onion Gravy freezes well. Stir well once defrosted and add 1 teaspoon of cornflour mixed with a small amount of water to the gravy before reheating.

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Make your own rich, sticky onion gravy in your slow cooker or crockpot! Perfect with Bangers & Mash or Toad in the Hole, we love it with our nut roast and it's so much tastier than gravy granules.

Slow Cooker Onion Gravy

Slow Cooker Onion Gravy – Make your own rich, sticky onion gravy in your Crock Pot. Perfect with Bangers & Mash, Toad in the Hole or a tasty nut roast! Naturally vegetarian and gluten free. Keywords
5 from 19 votes
Print Pin Rate Save Recipe
Course: Main Course
Cuisine: British
Prep Time: 10 minutes
Cook Time: 7 hours
Total Time: 7 hours 10 minutes
Servings: 10 people
Calories: 109kcal
Author: Sarah James
people

Equipment

  • Slow Cooker or CrockPot

Ingredients

  • 1 kg about 10 medium onions
  • 3 tablespoons vegetable oil
  • 3 tablespoons butter
  • 2 teaspoons salt
  • 1 teaspoon freshly ground black pepper
  • 125 ml dry white wine
  • 500 ml good quality vegetable or beef hot stock (I used Marigold Swiss Bouillon)
  • 2 tablespoons Balsamic vinegar
  • 1 teaspoon Dijon mustard
  • 2 teaspoons freshly chopped thyme
  • 2 tablespoons cornflour / cornstarch mixed with a little water
  • Optional: 1 tablespoon soy sauce

Instructions

  • Peel and thinly slice onions.
  • Grease the inside of your slow cooker pot and add the onions, oil, butter and salt and pepper.
  • Stir and place on the lid.
  • Cook on low for at least 6 hours (8 hours if you have the time) to caramelise the onions.
  • Once your onions are caramelised, add the wine, hot stock, balsamic vinegar, Dijon mustard and thyme and give it a good stir.
  • Turn your slow cooker to high and whisk in the cornflour water mix.
  • Replace the lid on your slow cooker but this time prop open the lid with a wooden spoon or spatula.
  • Cook on high for 1 to 2 hours.
  • Ladle your onion gravy into a jug or gravy boat.

Notes

Makes approx 1 litre – a serving is 100 ml
I’ve used brown onions but you can easily substitute red onions or shallots. Both will give a sweeter flavour profile to your finished gravy.
Substitute with your favourite stock to make a beef or chicken gravy.
I’ve used white wine but red wine works well , particularly with red onions.
Add a tablespoon of redcurrant jelly for extra fruity sweetness.
Slow Cooker Onion Gravy will keep in the fridge for up to four days.
Reheat in a pan on the stovetop on a medium heat for about 5 minutes, stirring occasionally.
Slow Cooker Onion Gravy freezes well.
Nutrition information is approximate and meant as a guideline only.
Nutrition Facts
Slow Cooker Onion Gravy
Amount per Serving
Calories
 
109
Calories from Fat 72
% Daily Value*
Fat
 
8
g
12
%
Saturated Fat
 
6
g
38
%
Polyunsaturated Fat
 
1
g
Monounsaturated Fat
 
1
g
Cholesterol
 
9
mg
3
%
Sodium
 
306
mg
13
%
Potassium
 
105
mg
3
%
Carbohydrates
 
13
g
4
%
Fiber
 
2
g
8
%
Sugar
 
5
g
6
%
Protein
 
1
g
2
%
Vitamin A
 
234
IU
5
%
Vitamin C
 
8
mg
10
%
Calcium
 
29
mg
3
%
Iron
 
1
mg
6
%
* Percent Daily Values are based on a 2000 calorie diet.

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Slow Cooker Onion Gravy - Make your own rich, sticky onion gravy in your Crock Pot. Perfect with Bangers & Mash, Toad in the Hole or a tasty nut roast - Delicious!


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And linking to: Fiesta Fridays

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Recipe Rating




Homemade Vegetarian Sausages - Tales From The Kitchen Shed

Thursday 19th of November 2020

[…] creamy mashed potatoes and onion gravy for the ultimate Bangers and […]

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Tuesday 25th of July 2017

[…] love wet food, so am enamored by this dark, sticky slow cooker onion gravy from […]

Kathy

Thursday 13th of July 2017

Could this be portioned up and frozen?

sarahj

Sunday 16th of July 2017

Thanks for popping by Kathy, the onion gravy freezes well, I often put portions in the freezer, they come in really handy.

Eb Gargano / easypeasyfoodie.com

Thursday 3rd of November 2016

Yum. What a fab tip for caramelising onions. REALLY NEED a slow cooker. Will start hinting to hubby :-) Eb x

sarahj

Monday 7th of November 2016

Thanks Eb, it's so easy to do. You never know, you may end up with a slow cooker for Christmas :-) x

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Friday 22nd of January 2016

[…] I don’t want to appear completely lazy though, so I would point out I made a nut roast and my Slow Cooker Onion Gravy on Christmas Eve to provide a vegetarian option for the next […]