1
-
large egg, beaten
-
1/4 cup all-purpose flour
-
2 (7-ounce) boneless, skinless chicken breasts, lightly pounded to 3/4-inch-thickness
-
1 teaspoon kosher salt
-
1/4 teaspoon coarsely ground black pepper
-
1/2 cup, plus 2 tablespoons (5 ounces) cold salted cultured butter, cut into pieces, divided
-
3 tablespoons olive oil
-
1/4 cup fresh lemon juice (from 2 lemons)
