Yes. Unless you're a junk food vegan (which you won't be if you follow our meal plan), dessert is perfectly acceptable.
In fact, desserts are often part of a healthy plant based diet because they contain healthy ingredients like fruit, and they don't contain unhealthy ingredients that are terrible for you, like cream, butter or eggs. You can even substitute gluten-free flour to make it easier on your tummy if you have a gluten issue.