Line a baking sheet with foil and place a wire cooling rack on top.
Arrange crackers in an even layer on the baking rack. Top each cracker with a piece of bacon and sprinkle about a teaspoon of brown sugar evenly on top, then a pinch of cayenne pepper and black pepper.
Bake until sugar begins to melt and bacon is crisp; about 30-40 minutes.
Cool completely and allow to harden before serving.
Once baked and cooled, the crackers can be kept at room temperature for up to 2 hours. To preserve them longer, pop them in an airtight container or zip-top bag and place in the fridge for up to 3 days. They can also be frozen for up to a month.