In a mixing bowl, beat butter for about 1 minute
Add powdered sugar and beat for 2-3 minutes
Add egg and beat for 1 minute
Add mango puree and blend completely
In another bowl, mix by hand the dry ingredients: flour, corn flour, baking soda, baking powder and salt.
Add the flour mixture into the puree mixture slowly by batches, folding to incorporate completely each time.
Bake in pre-heated oven at 360 degrees F for 30 minutes.
Take out of the oven and let it cool. Apply frosting on top if desired.