In a medium bowl, whisk eggs, salt and brown sugar until fully combined and smooth.
In a medium saucepan, combine milk and heavy cream. Cook over medium-low heat, stirring often, until steaming and small bubbles form at edges.
Remove from heat and cover with a lid, then let steep for 5 minutes. Using a fine sieve, strain the mixture to remove the tea leaves.
Gradually pour some of the hot milk mixture into the eggs while whisking continuously to temper them.
Return tempered milk mixture to saucepan. Cook over medium-low heat, stirring often, for about 5-6 minutes or until thick enough to coat the back of a spoon. If using a food thermometer, the temperature should read maximum 180°F (80°C).
Pour the hot custard into a bowl to prevent overcooking. Cover the bowl with plastic wrap, then let it cool down to room temperature before transferring to the fridge. Refrigerate for at least 2-3 hours or overnight before churning.
Pour chilled custard into ice cream maker. Churn according to manufacturer’s instructions until thickened.
Making the Boba Pearls:
In a small bowl, combine glutinous rice flour and brown sugar. Pour in boiling water and stir vigorously until a sticky dough forms. Add food coloring if desired.
On a lightly floured surface, knead dough briefly until smooth. Pinch off small pieces and roll between palms to make boba balls.
In a saucepan bring water to a boil. Add boba pearls, reduce heat to medium, and simmer until they float to the surface.
Drain boiled pearls and add to saucepan with brown sugar. Simmer over medium heat until glossy. Let cool completely.
Making the Syrup:
In a small saucepan, combine brown sugar and water. Simmer over medium heat until sugar dissolves.
In a small bowl, stir together cornstarch and cold water. Add slurry to sugar syrup and cook until thickened. Remove from heat and cool down completely.
Assembling the Molds:
Pour syrup into a squeeze bottle or piping bag. Pipe a layer of syrup into ice pop molds in a zigzag pattern.
Add boba pearls, gently pressing them into the syrup.
Scoop soft-serve ice cream on top to fill mold and smooth out with a spatula.
Top with more syrup and pearls. Insert ice pop sticks, then freeze until solid.
Notes
Teabags can be replace with loose leaf tea. In this recipe you would need 4 teaspoons of loose leaf black tea. Don't forget to strain the mixture to remove leaves.
Sweet glutinous rice flour is also called Mochiko in Japanese shops. It cannot be replaced with plain rice flour or tapioca starch.
Nutritional value is estimative only and is calculated per serving, without any additional toppings. This recipe makes 6 medium ice cream bars.
Storing: keep in the freezer in an airtight container for up to 2-3 weeks. Consume within a few days for the best texture.