Along with rémoulade, Sauce robert is one of the oldest French sauces to be described, the first time in the 16th centuty by Rabelais, but most famously mention in Charles Perrault’s story of Sleeping Beauty when the ogress asked her chef to prepare the princess and her children à la sauce Robert.
These days it is often served with grilled pork instead of Sleeping Beauty.
The recipe asks for chopped onions cooked in butter, a reduction of white wine, pepper, and demi-glace, finished with mustard.
Sauce charcutière is sauce Robert with cornichons.
Image by Daderot