Preheat cast iron skillet on medium-low, with a bit of oil.
Salt and pepper both sides of the chicken thighs. Lay thighs in pan skin side down
After 7 or 8 minutes, or when the thighs release easily, flip and sear the other side as well.
While waiting for chicken to sear, prepare shallots, white wine, chicken broth and cream.
Reserve chicken once well browned and cooked through. Drain excess fat, then sauté diced shallots in the same pan.
Add in white wine, reduce by about half. Add chicken broth and a bit of mustard, stirring to combine.
Finish sauce with a splash of cream, taste and adjust for seasoning. Serve.