1, add drinking cold water to the pot, put in the giardiniera without stirring, let it stand for 5-10 minutes first.
2. Turn on low heat and heat, stirring, until the gelatine slices melt and turn off the heat.
3. Pour the whole milk into a bowl. Pour the giletine into the whole milk and stir well with a whisk.
4. Pour the vanilla extract and powdered sugar into the milk mixture, stir thoroughly, and let it sit in the refrigerator for 1 hour, taking out and stirring 3 to 4 times every certain period of time halfway through the process to make light cream.