1. 1 banana, milk powder, 100ml water, 7g sugar, 4 slices of Oreo, 1 egg yolk
2. Take an egg and beat the yolk, add appropriate amount of milk powder and 7g sugar, mix well
3. Add 100ml boiling water and heat until the liquid is thick,
4. Cut the banana into small pieces and press into puree,
5. Mix with the thick liquid before,
6. Add 2 pieces of crushed Oreo cookies,
7. Mix well
8. Put it in the refrigerator and freeze it, take it out and stir it every 1 hour,
9. The ice cream ball can be scraped out for the 3-4th time
10. Scrape out the ice cream balls and place them in the container,
11. Add a few more Oreo biscuits
12. carry out
