Preheat your oven to 350°F (175°C).
Line your 9x9-inch baking pan with parchment paper, leaving some overhang on the sides.
In a microwave-safe bowl, combine the chopped dark chocolate and unsalted butter. Heat in 30-second intervals, stirring until melted and smooth.
Once the chocolate mixture is cool but still warm, whisk in the sugar, then add the eggs one at a time, mixing thoroughly.
In a separate bowl, whisk together the cocoa powder, gluten-free oat flour, and cayenne pepper.
Gradually fold the dry ingredients into the wet mixture using a spatula, being careful not to overmix.
Pour half of the brownie batter into the prepared pan, layer the chopped caramels on top, then pour the remaining batter over it.
Bake for 25-30 minutes, checking for doneness with a toothpick.
Allow the brownies to cool in the pan for 10-15 minutes, then lift them out using the parchment and let cool completely before slicing.