Easy Crockpot Bourbon Chicken (Sweet, Sticky, and Simple)

Ingredients

• 2 lb (900 g) boneless skinless chicken thighs, trimmed
• 1/4 teaspoon black pepper
• Cooking spray or 1 teaspoon neutral oil, for the slow cooker
• 1/3 cup (80 ml) bourbon
• 1/2 cup (120 ml) gluten-free tamari
• 1/3 cup (70 g) packed brown sugar
• 2 tablespoons honey
• 1/4 cup (60 g) ketchup
• 3 tablespoons apple cider vinegar
• 4 cloves garlic, minced
• 1 tablespoon grated fresh ginger
• 1/4 teaspoon red pepper flakes, optional
• 2 tablespoons cornstarch
• 2 tablespoons cold water
• 3 green onions, thinly sliced
• Cooked rice or steamed broccoli, for serving