Raspberry Fluff Frosting - cooking recipe

Ingredients

1 c. fresh raspberries
1 c. sugar
1 egg white

Preparation

Beat for a very long time (frosting gets stiffer and increases in quantity), probably about 15 minutes.
I serve this with angel food cake.
Cake can be frosted if it all will be eaten, but if not, I just pile some on each slice of cake.
The frosting keeps well until next day in refrigerator, but it soaks into the cake if kept on the cake.