The pink is real. In dragon fruit pulp, water-soluble betalains, especially betacyanins, absorb parts of visible light and return a saturated magenta signal, so a puree can color mousse, glaze, or frosting without synthetic dye. It looks almost digital.Heat is the thief. Once a batter or sauce spends too long at high temperature, betacyanins undergo thermal degradation: hydrolysis, oxidation, deca...More