Japanese Shokupan Milk Bread Culture and Bakery Tradition

Ingredients

• For the yudane
• 50 g Japanese high-protein bread flour, 11.5–12.5% protein
• 50 ml boiling water, poured directly over flour; mixed immediately
• For the final dough
• 300 g Japanese high-protein bread flour, 11.5–12.5% protein; not European bread flour
• 30 g caster sugar
• 6 g fine salt
• 4 g instant dry yeast, or 1% fresh yeast (3 g) for slower, more complex fermentation
• 170 ml whole milk, full-fat; warmed to approximately hand temperature
• 30 ml heavy cream
• 30 g unsalted butter, softened; up to 10% of flour weight as per entry principle
• For the pan
• 1 tsp clarified butter, for brushing the interior of the Pullman pan and lid

Method

1. 1
   The night before baking, place 50 g of flour in a heatproof bowl. Pour 50 ml of boiling water directly over the flour and mix immediately with a wooden spoon or spatula until no dry flour remains and a cohesive, slightly translucent paste forms. Press cling film directly onto the surface of the yudane and refrigerate overnight. The paste will firm and cool; this rest is not optional — it is the interval during which full starch gelatinisation and water absorption occur.
2. 2
   The following day, remove the yudane from the refrigerator and allow it to approach room temperature. In a large bowl, combine 300 g of flour, the sugar, salt and yeast. Add the whole milk, heavy cream and the entire yudane, broken into small pieces. Mix to a shaggy dough, then turn onto a clean surface and knead — or knead in a stand mixer with a dough hook — until the dough is smooth and cohesive. Add the softened butter in small pieces and continue kneading. This step is where the dish lives or dies: the dough must be worked until it achieves full windowpane development — a small piece stretched between the fingers should extend to near-translucency without tearing. Underdeveloped gluten will not support the high hydration and will produce a dense crumb irrecoverable at any later stage.
3. 3
   Shape the dough into a smooth ball and place in a lightly oiled bowl. Cover and allow to ferment at room temperature until doubled in volume. The dough should feel light, slightly gassy and spring back slowly when a finger is pressed into the surface.
4. 4
   Brush the interior walls, base and inner face of the Pullman pan lid thoroughly with clarified butter. Deflate the dough, divide it into equal portions suited to the pan, shape each into a smooth cylinder and arrange them in the pan in a single layer. Slide the lid closed. Allow a second proof until the dough has risen to approximately 1 cm below the rim of the pan — visible by removing the lid briefly at the start of proofing, then replacing it. The lid is not opened again until the end of baking.
5. 5
   Bake in a preheated oven — standard domestic setting for an enriched bread — with the Pullman lid firmly closed for the full bake. The lid must not be opened during baking: premature removal releases retained steam, permits uncontrolled oven spring and destroys the characteristic square profile. When the bake time appropriate to the oven is complete, remove the lid. The exposed top surface should be an even, pale golden colour, indicating deliberate suppression of crust development — dark or crackled crust signals overbaking.
6. 6
   Unmould the loaf immediately onto a wire rack. Allow it to cool completely before slicing — the interior crumb structure continues to set as heat dissipates, and slicing a warm shokupan compresses the delicate feathery structure permanently. The cooled loaf should feel light relative to its size, with a thin, yielding crust that offers no resistance to the hand.