To achieve fully transparent and chewy tapioca pearls for bubble tea, follow a two-stage cooking method with precise timing and resting. Use a large pot with at least an 8-to-1 water-to-pearl ratio to give the pearls ample space to move without clumping [1][2]. Bring water to a rolling boil before adding pearls—do not rinse them beforehand, as cold water dissolves surface starch. Once added, stir gently to prevent sticking to the pot bottom. After the pearls rise and water returns to a boil, reduce heat to medium or medium-low and maintain a gentle simmer [3].

Boil for 20 to 35 minutes depending on pearl size and brand; smaller pearls require less time [1][4]. The critical step for achieving translucency is the resting phase. After boiling, turn off heat, cover the pot with a lid, and let pearls sit undisturbed in the hot water for another 20 to 40 minutes [2][5]. This residual heat allows the hard white core to cook through completely without the outer surface becoming mushy. If pearls still show a hard center, they need extended resting time rather than additional boiling.

Once resting is complete, drain and rinse briefly with warm or cool water to remove surface starch and halt cooking [3]. Avoid prolonged rinsing, which can harden them. Finally, soak pearls in sugar syrup, brown sugar syrup, or black sugar sauce for at least 15 minutes to sweeten and maintain glossy appearance [4][5]. For optimal texture and translucency, consume within four hours of cooking, as refrigeration will eventually cause hardening and loss of clarity [1].