01 -
Whisk bread flour and water in a saucepan. Cook over medium heat, stirring continuously, until a thick paste forms, about 3 to 4 minutes. Remove from heat and allow to cool completely.
02 -
In the bowl of a stand mixer, combine bread flour, sugar, salt, and yeast. Add milk, egg, and cooled tangzhong paste. Mix on low speed to incorporate, then let rest for 5 minutes.
03 -
Gradually add the softened butter in increments while mixing. Continue to knead the dough using the dough hook for 15 minutes until smooth and elastic.
04 -
Transfer dough to a lightly oiled container, cover, and refrigerate overnight (8 to 12 hours) to develop flavor and structure.
05 -
Heat dark chocolate and butter together until melted and smooth. Whisk in powdered sugar, cocoa powder, and salt until fully combined. Allow to cool until spreadable.
06 -
On a lightly floured surface, roll cold dough to a 30 x 38 centimetre rectangle. Evenly spread the chocolate filling over dough and sprinkle with chopped pistachios.
07 -
Starting from a long edge, roll dough tightly into a log. Using a sharp serrated knife, slice log lengthwise. Twist both halves together, exposed sides facing up, and place in a greased 23 x 10 centimetre loaf pan.
08 -
Cover pan loosely and allow dough to proof in a warm place until visibly puffy, approximately 60 to 90 minutes.
09 -
Preheat oven to 180°C. Bake babka for 30 to 35 minutes or until golden and internal temperature reaches 88°C.
10 -
Simmer sugar and water in a small saucepan until sugar dissolves completely. Remove from heat.
11 -
Upon removing bread from the oven, immediately brush hot babka generously with sugar syrup. Cool in pan for 20 minutes, then transfer to wire rack to cool fully.