Chocolate Babka

INGREDIENTS

1 1/2 cups

warm milk, 110 degrees

each) packages active dry yeast

1 3/4 cups

plus a pinch of sugar

whole large eggs, room temperature

large egg yolks, room temperature

6 cups

all-purpose flour, plus more for work surface

1 tsp

salt

1 3/4 cups

unsalted butter, cut into 1-inch pieces, room temperature, plus more for bowl and loaf pans

2 1/4 lb

semisweet chocolate, very finely chopped*

2 1/2 tbsp

ground cinnamon

1 tbsp

heavy cream

1 2/3 cups

confectioners' sugar

1 1/3 cups

all-purpose flour

12 tbsp

unsalted butter, room temperature