Lemon cupcakes

I made these cupcakes for FHE and they were really good and easy!!!

I used a lemon cake mix and for the frosting I did

1 cube of butter 

the zest of one lemon and its juice

and powder sugar to the consistency that you want

I blended the butter. Added some powder sugar. Then added the zest and the juice. Then added the rest of the powder sugar.

These were REALLY GOOD!!!!