Smothered Chicken Thighs In Onion Gravy

Name: Smothered Chicken Thighs In Onion Gravy
Prep time: 30 min
Cook time: 25 min
Total time: 55 min
Yield: 8
Ingredients: 2 tablespoons unbleached all-purpose flour; 1 teaspoon onion powder; 1 teaspoon smoked paprika; 1/4 teaspoon cayenne pepper, or to taste; 1/2 teaspoon kosher salt, to taste; 1/2 teaspoon freshly ground black pepper; 1 tablespoon pure olive oil; 8 (3 pounds) bone-in chicken thighs, skin removed; 2 large sweet onions, chopped; 3 cloves garlic, minced; 3/4 cup homemade chicken stockor reduced-fat, low-sodium chicken broth, plus more if needed; 2 sprigs fresh thyme; 1 bay leaf; 1 green onion, thinly sliced, for garnish