Oven-Fried Onion Rings

INGREDIENTS

• :
• ½ cup all-purpose flour, divided
• 1 large egg, room temperature
• ½ cup buttermilk, room temperature
• ¼ teaspoon cayenne pepper
• ½ teaspoon salt
• ¼ ground black pepper
• 30 saltine crackers
• 4 cups kettle-cooked potato chips
• 2 large yellow onions, cut into 24 rings (see note)
• 6 tablespoons vegetable oil
• ½ cup mayonnaise
• 2 teaspoons ketchup
• 2 tablespoons horseradish
• ¼ teaspoon paprika
• ¼ teaspoon salt
• 1/8 teaspoon garlic powder
• 1/8 teaspoon dried oregano
• Dash ground black pepper
• Dash cayenne pepper