Crystal Bun with Purple Sweet Potato


Filling Wrappers
200g purple sweet potato 50g corn starch
15g icing sugar 50g wheat flour
12g osmanthus syrup 18g sugar
24g unsalted butter 170ml water
24g milk 2tsp vegetable oil
20g wheat flour


1. Filling: Peel the sweet potato and cut into small pieces. Place into the steam oven and cook at 100℃ for 20 minutes. While it is still warm, place into a food processor. Add icing sugar and osmanthus syrup then blend in the machine. Add butter and milk, blend until smooth. Add wheat starch and continue to blend. Place the mixture into the refrigerator and divide into 10 portions. Set aside.

2. Wrapper: Sieve the corn starch and wheat flour into the mixing bowl. Use low speed to combine the dry ingredients with the dough hook.

3. Boil the sugar in water until it is dissolved. Stir and pour into the kitchen machine. Change to medium speed and mix to form a dough. Add oil and knead until smooth and shiny. Divide into 10 portions.

4. Flatten the wrapper and roll into round shape. Wrap in 1 portion of sweet potato filling. 5. Place the crystal bun into a steam oven tray which is lined with baking paper. Steam at 100℃ for 10 minutes. Serve while it is still warm.

TIPS: The crystal bun is best served immediately after cooking as the wrapper is still warm and soft.

Recommended Product

Steam Oven

Bosch Steam Oven imitates the traditional way of steam cooking. The steaming temperature is controlled precisely to ensure your food is cooked to perfection.

Find out more

Kitchen Machine

The powerful Bosch Kitchen Machine for versatility when cooking and baking with excellent Bosch quality and a wide selection of accessories.

Find out more


Register for free and enjoy many benefits!

Our service

Outstanding service – before and after the purchase.

Service Hours: Monday to Saturday: 09:00 - 18:00 Except Sunday and Public Holidays

Telephone: 2626 9655 (Hong Kong) / 0800 863 (Macau local call only)

Experience Bosch

Discover quality, perfection, and reliability.

Find a dealer

Find dealers or service shops near you!