It's easy enough to color a cake green with food coloring, although it's not very common to see on anything other than icing—in this unusual cake recipe, parsley is a star ingredient that gives the cake that unmistakable green color no matter how you cut it. The recipe from Roberta's in Brooklyn makes use of some fairly normal cake ingredients like flour, baking powder, sugar and eggs, but the unexpected portion of the recipe comes from green inclusions like olive oil, parsley and mint leaves. It's suggested that after combining the ingredients, you should refrigerate the batter before cooking, so that it is able to develop an even richer green color.
Making the cake seems like a lengthy process, but it's definitely a dessert that dinner guests are not likely to have had before. Roberta's suggests serving the unusual cake with a scoop of vanilla ice cream, topped with freshly grated lemon zest.