Sauce Robert
Soft golden onions and Dijon mustard in a reduced brown sauce.

Soft golden onions and Dijon mustard in a reduced brown sauce.
Approximately 650 g sauce
Ingredients
Batch
- Demi-Glace500 g
- Onion, finely diced150 g
- Butter25 g
- Dry white wine150 ml
- Dijon mustard35 g
- Sugar5 g
Method
Sweat onion in butter until soft and lightly golden, 12 to 15 minutes.
Add wine and reduce by two thirds. Add demi-glace and sugar and simmer for 8 minutes.
Remove from heat and stir in mustard. Taste; do not boil after adding mustard.
Chef’s notes
- A classic brown mustard sauce for pork, sausages or roast potatoes.
- When scaling, adjust pan or tin size and work in batches where needed; cooking and proving times follow texture and temperature, not the portion multiplier.
Keeping
Cool promptly in shallow containers and refrigerate at 4°C or below. Use within 3 days. Reheat hot dishes thoroughly; prepare fresh garnishes at service.
Allergens and diet
Celery. Milk. Mustard. Sulphites. Wheat.
Also in the Recipe Book
Last refined · October 2026