1 cup dry white wine
1/3 cup white wine vinegar
2 tablespoons finely chopped shallots
2 1/4 cups heavy cream
3/4 pound butter, cut into cubes
to taste salt and pepper
In a medium saucepan, combine wine, vinegar and shallots. Reduce over high to approximately 1/2 cup. Add cream and bring to a boil and reduce to a sauce consistency.
The sauce should coat the back of a spoon. Remove from heat and stir in the butter in small batches.
Season with salt, white pepper and lemon juice.