Use a good quality Dijon mustard for the best flavor. It makes a noticeable difference in the sauce.
Let the wine simmer for about 2 minutes so the alcohol cooks off and the flavor concentrates.
If you prefer not to use wine, simply substitute extra chicken broth.
If the sauce becomes too thick, add a small splash of chicken broth or cream.
Chicken thighs work best because they stay juicy and tender while simmering.
Store leftovers in the refrigerator for up to 3–4 days.