Prepare the chicken: Flatten boneless, skinless chicken breasts so they are even in thickness for consistent cooking. Dredge: In a shallow bowl, mix flour with kosher salt and black pepper. Coat each chicken breast in the flour mixture and set aside.
Sear for flavor: Spray a sauté pan with butter-flavored cooking spray. Add the light butter and heat over medium-high. Once melted, lightly brown the chicken breasts in batches — this adds flavor without extra fat.
Slow cook it: Transfer the browned chicken to your slow cooker. Pour in chicken broth, white cooking wine, lemon juice, and capers. Cover and cook on low for 4 hours.
Make the sauce: Once done, use a slotted spoon to remove the chicken and keep it warm. Transfer the liquid from the slow cooker to a saucepan. Whisk together the cold water and cornstarch until smooth, then stir into the sauce. Bring to a boil and simmer for about 10 minutes until thickened.
Serve and garnish: Pour the sauce over the chicken and garnish with lemon slices and fresh parsley or basil, if desired.
This makes 4-6 servings. Enjoy!