How to "lighten" slightly bitter chocolate frosting?

I made some vegan chocolate cupcakes with (vegan) chocolate frosting; it tastes good but I can't help feeling like it's too bittersweet. I'm trying to keep things vegan (I'm giving a presentation about lifestyle and diet choices) so I wanted to know if anyone had suggestions on how to sweeten or lighten the flavour of the cupcakes without having to add any animal products. I thought maybe I could top them with strawberries, but I don't have any on hand. Anyways, suggestions are welcome!