Sour-Joe & Matcha is a bakery in Toa Payoh, Singapore, and its listing name says orders are taken by WhatsApp. It holds a 5.0 Google rating from 1 review, so the score is a thin guide.
A bakery that takes orders by message works as a small, made-to-order business, so planning is the most important part: ask how far ahead to book, what the cut-off is, how to pay, and how to collect or receive your order, and confirm the time and pickup details before you travel. The name points to sourdough and matcha, and sourdough, made with a live starter rather than commercial yeast, is chewy and tangy with a crisp crust, while matcha, finely ground green tea, tastes vegetal and slightly sweet and contains caffeine. Sourdough keeps well for a few days in a paper bag or cloth, but Singapore's humidity means it is best eaten or frozen soon. Popular dates fill up quickly, so regulars order early. Mention allergies such as gluten, nuts, dairy and eggs when you order.
For anyone in Toa Payoh, Sour-Joe & Matcha is a bakery to contact by message about an order.