Cut the chicken thighs into bite-sized pieces and season with salt and pepper.
Heat olive oil in a large skillet over medium heat.
Add the chicken pieces and cook until browned, about 5-7 minutes.
In a separate bowl, mix bourbon, soy sauce, brown sugar, garlic, and ginger.
Pour the sauce over the browned chicken in the skillet.
Bring to a simmer and let cook for 10 minutes, stirring occasionally.
In a small bowl, combine cornstarch with 2 tablespoons of water to create a slurry.
Stir the slurry into the skillet to thicken the sauce.
Cook for another 2-3 minutes until the sauce is glossy.
Garnish with chopped green onions before serving.