These Halloween cupcakes are mottled with orange and black, making for an awesome display once you bit them open - plus they're super simple to make, and they'll impress everyone who lays eyes on them. I recommend picking up some Halloween sugar decorations from your local baking shop to make them extra cute! You can find black food coloring for your Halloween cupcakes at professional cake shops, or else try large-scale culinary chains like Sur la Table or Williams Sonoma. If all else fails, you can buy it mail order from places like Amazon.com's Gourmet or Home and Garden sections. I use the black tube from my AmeriColor Soft Gel Paste Food Color Kit, which I picked up at a cake decorating store a while back. I love this stuff! I have so many colors to work with and it's unbelievable fun. Makes 12 cupcakes.