First, combine all the sauce ingredients. In a bowl, mix together soy sauce, bourbon whiskey, unsweetened apple juice, rice vinegar, maple syrup, minced garlic, grated ginger, and paprika. Mix well and set aside.
Rinse the chicken thighs and pat them dry with paper towels. Cut the chicken into 1/2-inch (1.3 cm) thick strips.
Add one tablespoon of cornstarch to a shallow plate. Lightly coat the chicken strips with the cornstarch.
Heat a skillet (or frying pan) over medium-high heat with oil. Add the chicken strips and cook for 6 to 8 minutes, turning occasionally, until golden brown and almost cooked through. Add the bourbon sauce mixture to the skillet and stir constantly to coat the chicken evenly with the sauce.
In a small bowl, mix one teaspoon of cornstarch with two tablespoons of water and whisk well. Lower the heat to medium and stir in the cornstarch mixture. Bring to a simmer, stirring constantly, and cook for about 5 minutes, or until the sauce thickens. Turn off the heat.
Dish out the chicken and serve immediately, garnished with chopped scallions sprinkled on top.