1. Pour water into a big bowl.
2. Put fresh strawberries into the water. Wash and soak it for 3- 5 minutes.
3. After that, remove leaves on the strawberries.
4. Then, cut and dice the strawberries.
5. Next, put diced fresh strawberries into a pot.
6. Add sugar into the pot with diced fresh strawberries.
7. Mix the strawberries and sugar well. Try to mash it while stirring it. Turn on a small fire and cook it for 8-10 minutes until the syrup thickens.
8. The following step, pour the strawberry syrup into a bowl and let it cool off completely before assembling the drink.
9. While waiting for the syrup to cool off, put the rest of the fresh diced strawberries into a bowl. Then, add sugar and mix it well.
10. When the syrup is ready to use, put strawberry syrup from step 8 into a jar or cup.
11. After that, add ice.
12. Scoop fresh diced strawberries with sugar mixture from step 9.
13. Pour milk into the jar or the cup.
14. Lastly, put a scoop of vanilla ice cream on top of the drink. (This can be optional.)