Cook the tapioca pearls according to the package instructions. Drain, then toss with the sugar while still warm until evenly coated. Set aside to cool slightly.
Brew the coffee. Prepare 2 double shots of espresso (or 120 ml / 4 fl oz strong coffee) and let it cool for a few minutes.
Assemble the drinks. Divide the tapioca pearls between two tall glasses and fill each glass with ice.
Add the milk. Divide the sweetened condensed milk and evaporated milk evenly between both glasses.
Pour in the coffee. Slowly pour the espresso over the ice. Stir well before drinking so the milk is fully combined.
Serve. Enjoy immediately with a wide boba straw while the tapioca pearls are still soft and chewy.
Notes
Use the nutrition card in this recipe as a guideline.