Sugared vanilla buttercream

I ran out of powdered sugar and tried making my own in the blender. The result was a smooth, creamy buttercream with a slight crunch from the half ground sugar crystals. It is so unexpected and very dekicious! A lovely mishap that makes a fantastic frosting for vanilla cupcakes!

1 cup sugar
1 tsp cornstarch
1 teaspoon vanilla
1/2 cup butter (room temp)
1 cup powdered sugar
1/3 cup whipping cream

Grind sugar and cornstarch together in a blender (not food processor) until powdery. Cream butter until pale yellow, gradually add both sugars, add vanilla. Turn to med-high and add 1/3 cup whipping cream. Beat until fluffy. Enjoy!