Hot chili peppers cake

This was a quick last minute cake I made today for my mom's friend. She asked for a plain cake. What is a plain cake? Give me an idea and I'm going to immediately over complicate it and come up with several different ideas and concepts to add to it. Chili chocolate cake.?! What colors.?! What can I add to plain? How plain??

 So, while this cake was technically simple, it was a good lesson in reigning myself in when applicable. Simple is not bad. I decorated the cake by piping some chili peppers and flames with icing colored with food gel.