To fix a cake disaster where your cake turned out burnt or overdone, start by carefully cutting off the top or bottom of the cake if it's burned, as well as any burnt parts on the edges. Then, heat equal parts sugar and water on the stovetop to make a simple syrup, and add a flavoring, like vanilla extract. Next, brush the syrup mixture on the cake, which will help moisten it. Finally, decorate your cake with other moist ingredients to make it less dry, like buttercream, fruit, and chocolate. To learn how to fix a cake that didn't rise, read on!. Layer a dry cake with moist ingredients to make it less dry. If you don't have time to make a simple syrup, apply a thick layer of buttercream frosting in the middle of the cake. Then use moist ingredients on top to decorate, such as fruit or chocolate.. If your cake is too dried out for either of the above remedies, you can use it as an ingredient in trifle. Assemble a light custard, some whipped cream, canned or cooked fruit and your dry cake. Cut the cake into bite-sized pieces..