Blueberry Swirl Cupcakes

This recipe is from my Rachel Lane Wild About Cupcakes book. It uses honey and thus, is sugar-free. The recipe only calls for mashed fresh or frozen blueberries. But since I have some blueberry puree left, I used that as well and mixed it into the batter. That's why the cake is a purplish colour (sort of like a bruise actually :P).