Grilled Chicken Teriyaki Skewers with Miso Ranch

• 12 bamboo skewers

Chicken Skewers:

• 2 pounds skinless, boneless chicken thighs
• ½ cup soy sauce
• ½ cup sake
• ⅓ cup mirin (Japanese sweet wine)
• ¼ cup brown sugar
• 2 tablespoons minced green onions
• 2 teaspoons finely grated ginger
• 1 tablespoon vegetable oil

Miso Ranch Dressing:

• ¾ cup mayonnaise
• ⅓ cup buttermilk
• ¼ cup sour cream
• 1 tablespoon white miso paste, or to taste
• 1 tablespoon minced green onion
• 1 clove garlic, crushed
• 1 tablespoon finely chopped fresh tarragon
• 1 tablespoon finely chopped fresh dill
• 1 tablespoon finely chopped fresh chives
• freshly ground black pepper to taste
• 1 pinch cayenne pepper