Fried Chicken Sandwiches with Slaw and Spicy Mayo

INGREDIENTS

• 1 garlic clove, finely grated
• 1/2 mayonnaise
• 1 Louisiana-style hot pepper sauce
• 1/2 small red onion, thinly sliced
• 1 jalapeño, thinly sliced
• 4 thinly sliced cabbage
• 1/2 slices, plus 1/4 cup pickle juice
• 2 all-purpose flour
• 1 ground black pepper
• 1/2 kosher salt plus more
• 1 buttermilk
• 2 8-ounce skinless, boneless chicken breasts, halved crosswise
• Peanut or vegetable oil (for frying)
• 4 white sandwich rolls
• 2 unsalted butter, room temperature
• A deep-fry thermometer