| Preparation | Cooking | Start to finish | 
|---|---|---|
| 15 min. | 20 min. | 35 min. | 
| 1 | Peel, rinse and chop 40 g shallot very finely. |  | 
| 2 | Pour 60 ml  dry white wine and 40 ml  white (spirit) vinegar into a saucepan on medium heat. Salt and pepper, then add the chopped shallot. Bring to the boil and leave to reduce gently by 3/4, until very little liquid is left. You can add 2 tablespoons liquid cream at this stage, which is not essential, but - apparently - this is the secret of a successful beurre blanc. |  | 
| 3 | Turn down the heat and begin incorporating 250 g butter (very cold) gradually in small pieces, beating continuously. |  | 
| 4 | Only add more butter once the previous pieces have melted. |  | 
| 5 | Continue until all the butter has been incorporated and you have a smooth sauce. Check seasoning. |  | 
| 6 | Beurre blanc can be kept hot for a few minutes at 50°C (122°F), but not too long. Serve in a sauce boat or on the plates. |  | 
