A box mix recipe made fun. For Halloween's black, orange and purple cake, see here: www.cookingwithsugar.com/amazing-halloween-rainbow-party-bundt-cake-recipe . Should you become adventurous, here's an example of a Christmas cake using white, green and red; see here: www.cookingwithsugar.com/rainbow-tie-dye-christmas-wreath-bundt-cake . I think peppermint extract would go well for Christmas. This Mardi Gras I think I'll make a yellow, green and purple cake. The combinations are endless...4th of July, etc. Just remember for any color other than black, change out the chocolate cake mix.