Pistachio-stachio

One last holiday cupcake forced on everyone I know. I wanted to do something different and I had a conversation with someone that I can't remember about some pistachio cake her mom or grandma used to make and how it was amazing. If you read this and it is you, please tell me.  I came up with this little cake out of my head though. It is yellow pistachio cake with pistachio buttercream. The cake ended up very moist though it did fall a little.