Blueberry Orange Mug Cake

I think I just might be obssessed with these little cakes.  They are so quick and easy to make, and it's fun to experiment with different flavor and ingredient combinations.  This time I was inspired by my morning smoothie, an oatmeal, blueberry and orange juice combination. It was delicious, which got me to thinking of how the flavor combination might work in one of these quick cakes.