Homemade boba pearls
In a small pot, slightly heat the water and dissolve brown sugar with warm water. Let the liquid slightly cooled down. Add 1/3 of the tapioca flour in. Continue stirring and heat over slowest fire until all the content is well combined and form a smooth paste.
In a small pot, melt 2 slices of brown sugar slab and 1cup brown sugar with 1/2 cup of water in a small pot. Simmer until well melted. Set aside to cool down.
Bring a large pot of water (at least 6 times of the volume of the pearls) and cook the pears for 20 to 30 minutes. Then transfer the balls into a cold water (they shrink to original size immediately). Wash under running water. Drain and mix with 2 tablespoons of brown sugar syrup to avoid sticky together.
Drizzle some brown sugar syrup in serving cup, rotate the cup so the syrup can form marbles on the cup wall. Place boba pearls in. Pour in milk. Shake or stirring before enjoy.