I try to do something different every week, whether it's adding blueberries or some other fruit, or spices like cinnamon, or even some cocoa powder for a chocolatey spin.
When baking these I hadn't actually planned for a chocolate frosting but after my maple glaze went a bit «meh» I figured my next best bet was somethingchocolatey and boy oh boy, did it addsomething to the recipe.