Mid-Autumn Festival Mooncake Traditions

Ingredients

• For the lye water pastry
• 300 g plain flour, sifted
• 210 g golden syrup
• 90 ml neutral oil
• 1 tsp lye water (kan shui)
• For the filling
• 840 g lotus paste, cooked down until firm enough to hold shape
• 12 salted duck egg yolks, centred within each portion of paste
• For the egg wash
• 1 egg, beaten, for washing twice

Method

1. 1
   Combine the golden syrup, neutral oil, and lye water in a bowl. Stir until fully integrated. Add the sifted flour and mix until a smooth, pliable dough forms — do not knead beyond this point. Overworking develops gluten and the pastry will lose its tenderness. The dough should feel soft and slightly tacky but not sticky. Rest, covered, for 30 minutes.
2. 2
   Ensure the lotus paste is dry enough to hold a clean shape. Divide into 12 portions of 70 g each. Place one salted egg yolk at the centre of each portion and seal the paste firmly around it, rolling to a smooth ball. The yolk must sit precisely at the centre — this determines both the structural integrity and the cross-section aesthetic of the finished mooncake.
3. 3
   Divide the rested pastry into 12 portions of 30 g each. Flatten each portion into a disc. Place one filling ball in the centre and ease the pastry up and around it, using the palm to work gradually and evenly. Pinch the seam closed. The pastry skin must cover the filling completely with no cracks or thin patches — this is where the dish lives or dies, as uneven coverage will split during baking and collapse the pattern.
4. 4
   Lightly flour the mooncake mould. Press each pastry-wrapped ball into the mould and apply firm, consistent pressure to stamp the pattern. Invert and release onto a lined baking tray. The pattern should be sharply defined and even across all pieces.
5. 5
   Bake in an oven preheated to 180 °C for 10 minutes. Remove from the oven. Apply the first egg wash with a pastry brush in a thin, even coat — take care not to flood the embossed pattern. Return to the oven and bake for a further 10–12 minutes. Apply a second egg wash midway through this final period. The mooncakes are done when they are a deep, even golden brown and the pastry is set firm to the touch.
6. 6
   Remove and cool completely on a wire rack. Transfer to an airtight container and rest overnight at room temperature. During this period the oil returns to the pastry surface, transforming the texture from dry and firm to soft, slightly glossy, and yielding. The mooncakes are ready when the skin has this characteristic tender, moist quality — a dull or dry surface indicates insufficient rest.