Japanese Melon Pan and Enriched Sweet Bun Bakery Culture

Ingredients

• For the enriched bread dough
• 300 g bread flour
• 30 g caster sugar
• 5 g salt
• 6 g instant dried yeast
• 2 eggs, lightly beaten
• 80 ml whole milk, warmed
• 50 g unsalted butter, softened, cubed
• For the sablé cookie crust
• 100 g plain flour
• 70 g caster sugar
• 50 g unsalted butter, softened
• 1 egg, lightly beaten
• 1 tsp vanilla extract
• 1 tsp baking powder
• To finish
• 30 g caster sugar, for rolling the crust portions

Method

1. 1
   Combine bread flour, sugar, salt, and yeast in a large bowl. Add the beaten eggs and warmed milk. Mix to a shaggy dough, then knead until cohesive — approximately 8 minutes by hand. Add the softened butter in stages, continuing to knead until the dough is smooth, elastic, and no longer sticks to the work surface. The dough is ready when it passes the windowpane test: a small piece stretched between the fingers holds a thin, translucent membrane without tearing.
2. 2
   Shape the dough into a ball, place in a lightly oiled bowl, cover, and allow to prove at room temperature until doubled in volume. The surface will appear domed and the dough will hold a dimple pressed gently with a floured finger without springing back immediately.
3. 3
   While the dough proves, prepare the sablé crust. Beat the softened butter and caster sugar together until pale and light. Add the beaten egg and vanilla extract; mix to combine. Sift in the plain flour and baking powder and bring together into a smooth, pliable dough. Divide into eight equal portions, roll each into a ball, and refrigerate until the bread dough is ready. The crust dough must remain cool and pliable — not warm, not crumbling.
4. 4
   Knock back the proved bread dough and divide into eight equal portions. Shape each into a smooth, taut ball. Remove the sablé portions from the refrigerator. Working one at a time, press a sablé portion flat between two sheets of cling film to a disc of approximately 3 mm thickness — no thicker. This is where the dish lives or dies: a crust rolled thicker than 3 mm will bake hard rather than crisp, and the defining textural contrast between shattering cookie exterior and cloud-soft interior will be lost entirely. Lay each disc over a bread ball and press gently so the sablé adheres and wraps to cover the top and sides, leaving the base of the bun exposed.
5. 5
   Roll each wrapped bun lightly in caster sugar, then use a bench scraper or the back of a knife to score a crosshatch pattern across the top of the cookie crust. The cuts must be shallow — surface marks only. Through-cuts will prevent the crust expanding with the dough beneath and the pattern will split and gap. The scored lines should be clearly defined but the crust beneath them unbroken.
6. 6
   Place the buns on lined baking trays, spaced well apart, and allow to prove for a second time until the dough has visibly puffed and the buns feel pillowy and light when the tray is gently shaken. The sablé crust will show fine stress lines at the score marks as the dough begins to expand.
7. 7
   Bake in an oven set lower than standard enriched dough temperature — approximately 170 °C — until the cookie crust is set to a pale golden colour and the crosshatch pattern is clearly defined. The crust must not overbrown; the interior will not yet be cooked if the exterior colours too quickly. The buns are done when the cookie crust is firm and biscuit-gold, the buns hold their shape when gently pressed from the side, and the base sounds hollow when tapped.
8. 8
   Transfer to a wire rack. Melon pan is categorically superior in the first 30 minutes from the oven — the cookie crust is crisp and the interior steaming-soft. As the buns cool, moisture migrates from the interior and the crust softens progressively. Serve warm. Do not refrigerate.