Real Onion Sauce

Proper Onion Sauce
  • Yield : Medium Bowl
  • Servings : 8
  • Prep Time : 15m
  • Cook Time : 30m
  • Ready In : 45m

This Onion Sauce is really simple but may take you a little time to get used to the technique right. Although I’ve given specific measurements you can experiment a fair bit and learn to trust your eyes…

It’s a real winner with Yorkshire Puds


  • 1 x Large Brown Onion
  • ½ Pint Semi Skimmed Milk & A Good Splash of Double Cream
  • 1 x tbsp Plain Flour
  • 1 x Large nob of Butter


Step 1

Dice your onion and then gently fry in the butter to "just" soften, over a medium heat - Do not over cook, you are just releasing flavour...About 3 or 4 minutes should do it.

Step 2

Now add your flour (and possibly a little more butter) to make a "Roux". Using a flat wooden spoon or a whisk "cook off" the flour stirring/whisking constantly. Watch things don't catch and burn on the bottom of the pan - Just make sure you keep things moving! I find using a flat silicone spatula works a treat. About 2 minutes should be fine here...

Step 3

Now add your milk and gently bring to the boil and then immediately turn the heat right down to a simmer - keeping stirring (Do not let it catch on the bottom!) TIP: If you've used too much flour you may need to add a little more milk...

Step 4

When your sauce has thickened add your double cream and season with salt and white pepper (I like to chuck in a nob of butter at this stage too...;¬)

I just like cooking great food..

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Comments (2)

  1. posted by Diane Adcock on January 27, 2024

    My husband has been asking for onion sauce with lamb for a while now but I’ve never heard of it,definitely not with lamb,lamb and mint sauce,right?
    I’ve finally given in,made it following your recipe,anx it went down a treat.
    Thank you so much,a straightforward, simple recipe.


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