2 cups Powdered Sugar (I’ve seen recipes that use more than 3 cups of confectioners’ sugar for the same amount of butter and shortening and if you like a really sweet frosting, you might try adding more. But 2 cups, I found, was just perfect).
¼ cup Mango Pulp or Puree
1 tsp Pure Vanilla Extract
Cream together the butter and shortening until they are fluffy, about 1 minute.
Now add the mango puree and vanilla and half the sugar. Beat until mixed, then add the remaining sugar and beat until mixed. This should take no more than 2 minutes altogether.
Frost the cupcakes after they’ve cooled completely.
Recipe by Holy Cow! at http://holycowvegan.net/2009/11/mango-cupcakes-with-mango-buttercream.html