In a mixing bowl, combine softened cream cheese, shredded cheddar cheese, cooled cooked bacon, mayonnaise, sour cream, hot sauce (if using), salt, and pepper. Mix until well incorporated.

Cut a thin slice off the bottom of each bagel to create a stable base and hollow out the center, avoiding cutting through the sides.

Generously fill each hollowed bagel with the prepared filling and smooth the tops.

Preheat your oven to 375°F (190°C), place filled bagels on a lined baking tray, and bake for 12–15 minutes until golden brown and bubbly.

Let the bagels cool slightly, then garnish with reserved bacon and fresh chives before serving warm.