It seems like every few months, I always see a new flavor of the famous Trader Joe's Mini Sheet Cake on my Instagram feed. There's lemon, carrot, cookies and cream, and even pumpkin in the fall. Up until now, I've never made a point to seek out and try any of the seemingly-viral cakes. However, that recently changed when I saw their latest flavor creation: Strawberry Mini Sheet Cake. If I had to pick, strawberry cake with strawberry icing would be my favorite cake flavor.