- Peel and cut the mango into chunks. Measure out 2 ½ cups, being sure to pack down the mango chunks gently into the measuring cup for a more accurate measurement. Place the mango into a tall-sided container, like a 4 cup glass measuring cup. (If you don't have an immersion blender, place the mango in the bowl of a food processor or blender.)
- Taste a small piece of the mango and take note of how sweet or tart it is. If it's very sweet and ripe, add only ⅓ cup granulated sugar in with the mango. If the mango is not very sweet or even slightly under-ripe, I suggest adding the full ½ cup of sugar.
- Add in the lemon or lime juice with the mango and sugar. Using short pulses, blend the mango mixture with an immersion blender (or food processor/blender), making sure to move the blender around the container to blend evenly. You can either leave the mixture slightly chunky (my preference), or blend it completely smooth.
- Stir the mixture with a spoon to make sure there are no large chunks remaining, blending again briefly if necessary. Taste the mixture to make sure the sugar has completely dissolved and for sweetness. If desired, stir in more sugar and/or lime or lemon juice. Stir well to dissolve the added sugar.
- Pour the popsicle mixture into molds, leaving about a ½ inch gap at the top of the mold to allow for expansion of the mixture as it freezes. Add popsicle sticks to the molds and freeze until solid, a minimum of about 4 hours.