Ingredients
4 boneless, skinless chicken breasts (about 2 pounds total)
1/2 cup all-purpose flour
Coarse salt and ground pepper
3 tablespoons extra-virgin olive oil
2 tablespoons champagne or white-wine vinegar
3 tablespoons unsalted butter, cut into pieces
2 tablespoons capers, plus 1 teaspoon brine
1 tablespoon chopped fresh parsley
Preparation
Slice each chicken breast in half horizontally. Place each half between sheets of plastic wrap and pound to an even thickness with a meat mallet or small skillet. Place flour on a plate. Season chicken with salt and pepper, then coat with flour, shaking off excess. In a large skillet, heat 2 tablespoons oil over medium-high. In batches, cook chicken until browned and cooked through, about 3 minutes per side (add remaining oil to pan, if necessary). Transfer to a platter and tent with foil.
Add vinegar to pan and cook, scraping up browned bits with a wooden spoon, 1 minute. Add butter and capers and brine; cook, stirring, until butter is melted. Season with salt and pepper. Pour sauce over chicken and top with parsley.
