20 g of fresh baker's yeast or 1 sachet of 8 g of dried yeast
80g powdered sugar
7 g of salt
80 g soft butter (at room temperature)
TO GARNISH
120 g of homemade spread
40 g of dark chocolate
FOR THE TOP
2 tablespoons of milk
1 egg yolk
Instructions
In the bowl of your stand mixer, pour the flour, salt, sugar, crumbled yeast, milk and eggs at room temperature.Mix for 5 minutes at low speed (1 on a KitchenAid) to homogenize the dough.Then gradually add the soft butter in small cubes and knead for 15 to 20 minutes until the dough is smooth and elastic.
Then let the dough rest at room temperature (around 24°C), covered with a clean, dry cloth for around 1 hour. It should at least double in volume.Then gently degas the dough, removing the air.Then cover your bowl with the dough in it and refrigerate overnight.
The next day, your dough should have doubled or even tripled in volume.Flour your work surface and roll it out into a rectangle approximately 30 x 40 centimeters wide (the length of a cake dish).Then spread the chocolate spread on the upper surface of your rectangle of dough.Cut the dark chocolate into small pieces and spread over the spread.
Roll the dough onto itself and form a tight cylinder. Its length should be equivalent to the length of your cake dish.
Cut the cylinder of dough in 2 lengthwise and then braid the 2 parts.
Line your cake dish with baking paper and place your braided dough on it.Leave to rest for another hour at room temperature (or near a radiator) under a clean, dry cloth.
Preheat your oven to 170°C.
Brush your babka with the egg yolk and milk mixture, using a kitchen brush.
Bake for around 45 minutes over rotating heat and check the cooking using a kitchen knife by inserting it into the brioche. It should come out without any brioche dough on it.
At the end of cooking, remove your brioche from the cake dish and leave to cool.
Notes
Do not hesitate to place a baking tray at the top of the oven during cooking because the brioche tends to color quickly.