
Place 1 cup chicken broth, pieces of 1 5.2-ounce wheel Boursin cheese, and ¼ cup dry white wine in microwave-safe bowl.
Microwave ingredients 60 seconds, then stir mixture. Continue microwaving ingredients in 30-second increments, stirring well after each burst, until cheese is just melted. Whisk ingredients vigorously until fully incorporated into smooth mixture.
Add 3 tablespoons cornstarch, 1 teaspoon garlic powder, and ½ teaspoon salt to bowl. Whisk vigorously until fully incorporated into smooth mixture.
Place medium saucepan on stovetop over low heat. Add 1 cup chicken broth, pieces of 1 5.2-ounce wheel Boursin cheese, and ¼ cup dry white wine.
Heat ingredients over low heat, whisking often until cheese is just melted. Once melted, whisk ingredients vigorously until fully incorporated into smooth mixture.
Add 3 tablespoons cornstarch, 1 teaspoon garlic powder, and ½ teaspoon salt to bowl. Whisk vigorously until fully incorporated into smooth mixture.
Place 4 medium boneless, skinless chicken breasts in Crockpot. Season top of chicken breasts generously with salt and freshly cracked black pepper. Flip chicken breasts over and again season top generously with salt and pepper.
Arrange chicken breasts in Crockpot in one even layer if possible. Pour Boursin sauce evenly over chicken.
Secure lid on Crockpot and cook 2 to 3 hours on HIGH, or 6 to 7 hours on LOW.
Periodically check internal temperature of chicken breasts using internal meat thermometer inserted into thickest section of chicken. When internal temperature of chicken breasts reaches 160° Fahrenheit, carefully remove chicken breasts from Crockpot and place on large plate.
Set chicken aside to rest 5 minutes. After 5 minutes, internal temperature of chicken breasts should read 165° Fahrenheit minimum.
While chicken rests, whisk sauce in Crockpot to reincorporate if needed.
Transfer chicken to serving plates. Spoon sauce from Crockpot over chicken breasts as desired, then garnish with chopped chives (optional). Serve warm with sides of choice.