1. Put the coffee beans and milk in the refrigerator in an airtight box and soak for two nights
2. Filter out the milk, about 160 grams, and make up the milk to 210 grams
3. Add sugar in water and heat until it melts and then remove from heat
4. Gelatine flakes are soaked in cold water to soften, then put in milk and stir evenly
5. Add whipped cream and stir well
6. Sift the milk liquid twice
7. Finally, bottle and refrigerate overnight
8. Smooth and tender
9. Let's eat
