The present disclosure presents a solution to producing mogrosides and mogroside-based sweeteners having low or no calorie. By using recombinant gene and plant transformation techniques, non-native genes encoding mogroside pathway enzymes are introduced/implemented into the genome of a plant hereby forming a transgenic plant, wherein the plant by the native genome thereof prior to transformation may not produce mogrosides naturally. Such transgenic plant and a progeny thereof are enabled to produce non-native mogrol precursors, mogrol, mogrosides, and/or metabolites or derivatives thereof.