Cut 1 large fresh mango lengthwise as close to the seed as you can on both sides. Then cut off any additional mango left around the edge of the seed. Remove skin. Thinly slice mango and set aside in bowl. Sprinkle 2 tablespoons sugar over fruit and a squeeze of fresh lime juice onto mango as well. Allow fruit to mascerate for at least 30 minutes to allow the sugar to extract as much juice as possible.
To make the daiquiri, combine sweetened mango and all the juice in the blender with 6 ounces coconut rum and a big handful of ice. Blend until smooth.
To make the topping, whisk 1 teaspoon coconut cream, 2 tablespoons heavy whipping cream, 1 teaspoon sugar, and 1 teaspoon coconut rum together until light and fluffy.
Garnish with fresh mango and a bright beautiful berry.