Technically considered a legume, carob comes from the ground up pod of the carob tree. The pods are often roasted before they are ground to give the carob a more "chocolaty" taste. Carob powder is very similar to cocoa powder and can be substituted in most recipes with excellent results. It can be added to baked goods, smoothies, hot "cocoa", fudge, etc., and most anything calling for cocoa. It also contains no caffeine, making it a perfect alternative for those that are health conscious or allergic to chocolate. You can find carob powder at health food stores like Whole Foods Market and some large supermarkets.
Some vegans maintain that honey is an animal product and will not use it. Others believe it is an animal by-product and therefore it is allowed. There are a few recipes in this series that use honey. This is one of them. Purists can substitute barley malt, maple syrup, corn syrup or molasses, in it's place. It will however, alter the flavor a bit.
Refer to the article Kitchen Supplies For Vegan Bakers for tips on; Appliances, Ingredients, Tips, Gadgets & Techniques for Vegan Baking. It will tell you what some of these ingredients are, where to get them and how to make vegan baked goods.