Step 1: Mix glutinous rice flour, rice flour and santan powder into a big mixing bowl.
Step 2: Dissolve Tang Mango Flavor powder with the hot water and add in the oil, mango essence and yellow coloring.
Step 3: Pour this into the flour mixture and mix till smooth and well blended. Microwave on high for one minute.
Step 4: Stir and continue to microwave, one minute at a time until mixture is translucent and cooked.
Step 5: (Cooking time depends on the wattage of your microwave) Leave aside to cool. For easy moulding of mochi, use plastic gloves and greased them with some oil.
Step 6: Take a 30 g piece of dough and flatten it into a round disc, wrap in as much mango cubes as desired.
Step 7: Seal the edges tightly and shape it into round balls. Coat the shaped mochi with dessicated coconut. Serve chilled.