Step 1Heat the oven to 350 degrees. Lightly grease a 13-by-9-inch baking dish.
Step 2In the bowl of a stand mixer or in a large bowl using an electric mixer, beat together the butter, sugar and vanilla. Beat in the eggs, one at a time, until thoroughly combined.
Step 3In a separate medium bowl, sift together the flour, cocoa powder, cayenne pepper, cinnamon and salt.
Step 4Slowly beat the dry ingredients into the butter mixture. Continue mixing until evenly combined to form a batter.
Step 5Gently fold in the cherries and chocolate chips using a spatula. Pour the batter into the baking dish, using the spatula to level the top of the batter.
Step 6Bake until the brownies are set and a toothpick comes out clean, 35 to 40 minutes. Remove the brownies to a rack, and cool completely before serving.