Elana's Pinkberry Frosting

This is E's Pinkberry frosting because it is made out of Greek-style yogurt and is still very tangy, like Pinkberry and all those other crazy non-sweet frozen yogurts out there. She says it goes great on top of banana bread or pumpkin bread. The Sour Cream Frosting of Doom incident a few years ago makes me a little skeptical, but E knows food, so I trust her.

Elana's Pinkberry Frosting
1 cup Greek yogurt (Fage is best)
A good splash of vanilla extract (I used 1 t)
1/2 cup powered sugar

1. Whisk all ingredients until they become a bit thick.
2. Place in the fridge to thicken even more (at least 30 minutes -
ideally overnight).
3. Spread on cake or cupcakes.