This is a blatant rip-off of the Irish Car Bomb cupcake recipe posted by BrownEyedBaker (and she borrowed it also). I made her recipe and these cupcakes are just awesome. The Mexican version simply replaces the Irish alcohol with Mexican alcohol. I've also changed the frosting to half of what the original was - I had more left over than I used, and I wasn't shy in my frosting. I used semi-sweet chocolate as I could not find bittersweet so I just went with the percentages and got as close as I could. Don't be afraid to up the volume of alcohol in the ganache & frosting if you're so inclined :) Use chili infused chocolate if you can find it or add some chili pepper to the cupcake mix to spice it up.