Check the listing for details. Dr. Oetker Glycerine 38ml. Condition: New. Listed at 3.32 USD. Dr. Oetker Glycerine 38ml Dr. Oetker Glycerine is typically used for the perfect Christmas bake: preventing royal icing from going hard, and keeping sponges moister for longer. Dr. Oetker Glycerine prevents soft fondant icing setting too hard, Adding a teaspoon to your mix, will keep your bakes moist for longer, Add a small amount of gycerine when heating sugar to high temperatures to help prevent the sugar crystalising, Suitable for vegans.