Preheat the oven to 350 degrees. Line a 9x13 pan with parchment paper, leaving an overhang on two sides. Press the paper into the corners of the pan and lightly grease the paper with butter.
In a microwavable bowl, melt the 2 sticks of butter in microwave and let cool slightly.
Add the sugar, eggs and vanilla to the butter and mix until well blended with a whisk or spoon.
Add the flour, cocoa cinnamon, chili powder, baking powder and salt and whisk or stir until smooth.
Pour and spread the batter in the baking pan and bake until a toothpick inserted in the middle comes out fudgy, 20 to 25 minutes.
Cool brownies in pan on a wire rack, then use the parchment paper to lift out the brownies. Cut and serve.