Cake Mix Singles

I'm experimenting with this - but it seems that 2 parts cake mix and 1 part yogurt mixed together until smooth - microwaved for 1 minute results in a nice portion of soft cake that is good to have with some ice cream or whipped cream.

I bought some diet brownie mix that had this on the box - but my experiment is with using regular mixes.  The portions are so small that I don't think a diet version is needed to do this...