Cheddar Biscuits with Caramelized Onion Gravy

Ingredients

• Biscuits
• 2 cups all-purpose flour
• 1 tablespoon baking powder
• ¾ teaspoon salt
• 8 tablespoons unsalted butter, cubed
• 1 cup shredded cheddar cheese
• 1 cup buttermilk
• Gravy
• 1 tablespoon olive oil
• 1 large sweet onion, thinly sliced
• 3 tablespoons unsalted butter
• ¼ cup all-purpose flour
• 1½ cups half-and-half
• Salt
• Freshly ground black pepper
• Pinch of cayenne pepper