Preheat the oven to 350 Fahrenheit.
Grease pan (9" x 13").
Melt the butter in a non-stick saucepan using low to medium-low heat. Do not boil.
Remove butter from heat and allow it to cool slightly.
Add eggs and sugar to the butter in sauce pan and stir until the mix is creamy.
Stir in cayenne pepper powder, cocoa powder, cinnamon, flour, baking powder, and salt. Stir until mix is smooth.
Slowly pour mix into greased pan making sure the it is evenly distributed.
Place pan in oven and bake for 20 minutes.
After cooking, let brownies rest and cool for 5 minutes before cutting.