Blender mango juice. 1  1. Wash the mangoes to remove any dirt. Then peel the ripe mangoes. 2  2. Cut the peeled mangoes into small pieces. 3  3. Put them in a blender together with crushed ice, water, and sugar.  4. Blend until 1  smooth. 5. Run the blended mixture through a sieve.  6. Throw away the leftover pulp and mango fibers.