Chile-Butter Chicken With Vinegared Potatoes - Alison Roman

Ingredients

• 1 (3 1/2-pound) chicken , or 3 1/2 pounds bone-in, skin-on chicken parts
• Kosher salt
• black pepper
• 6 tablespoons unsalted butter
• 2 tablespoons olive oil , plus more as needed
• 2 teaspoons red-pepper flakes
• 1 teaspoon hot smoked paprika
• 2 garlic cloves, finely grated
• 1 ½ pounds Yukon Gold potatoes (about 5), scrubbed and sliced 1/4-inch thick
• ¼ cup distilled white vinegar
• 1 cup cilantro or parsley , tender leaves and stems, coarsely chopped
• 2 scallions , thinly sliced