If u have been to Taiwan 九份. This is where u can find their signature dish there.

It is here in Singapore too. Price between $2.80 -$3.50
Reasonable size

Ask for their rewards card that come with rewards of a free dessert as u spend more.

This come with Milk, black sugar syrup, ai-Yu, taro balls, pearls and red beans

Cost : $3.50
Ratings : 8/10