Ingredients
180 ml milk
60 g butter
250 g bread flour
250 g all-purpose flour
2 tsp active dry yeast
50 g white sugar
60 ml water
1 large egg
0.75 tsp salt
5 (28 g) squares semisweet chocolate, finely chopped
1.5 tsp ground cinnamon
80 g white sugar
60 g butter, chilled
30 g confectioners' sugar
30 g all-purpose flour
60 g butter, chilled
1 large egg, beaten
15 ml water
Directions
Step 1
Warm the milk and melt the butter in a glass or ceramic bowl in the microwave for 30 seconds, or in a saucepan on the stovetop. In a separate bowl, combine bread flour, all-purpose flour, yeast, and sugar. Add water, the milk-butter mixture, egg, and salt to the dry ingredients and mix well to form a dough.
Step 2
Using the dough hook in a stand mixer on low speed or by hand, knead the dough for about 15 minutes until it is smooth and elastic. If the dough is too wet, add more bread flour, about 2 tablespoons at a time (up to 8 tablespoons) to make a workable dough. Cover the dough with a damp cloth and let it rise until double in size, about 1 to 1 ½ hours.
Step 3
While the dough is rising, prepare the chocolate filling and streusel.
Step 4
For the filling: Stir together the finely chopped chocolate, cinnamon, and sugar. Cut in the chilled butter with a fork.
Step 5
Make the streusel: Combine the confectioners' sugar and all-purpose flour, then cut in the chilled butter until the mixture resembles coarse crumbs.
Step 6
Once the dough has doubled, punch it down and divide it into two equal pieces. Loosely shape each piece into a ball, cover with a damp cloth, and let rest for 10 minutes.
Step 7
Roll out one portion of dough on a lightly floured surface to form a 15x4-inch (38x10 cm) rectangle. Sprinkle with half of the chocolate filling, roll up to form a long log, and seal the seam. Join the ends to form a circle and place the ring, seam-side down, on a parchment-lined baking sheet.
Step 8
Repeat with the second piece of dough.
Step 9
Use a serrated knife or kitchen shears to cut slits at 1-inch (2.5 cm) intervals around the rings. Cover the rings with damp kitchen towels and let rise until doubled in size, about 30 minutes.
Step 10
Preheat the oven to 175°C (350°F).
Step 11
Prepare the egg wash by combining the beaten egg and water in a small dish. Brush the loaves with the egg wash, sprinkle the streusel on top, and bake the loaves until deep golden brown, about 25 minutes, rotating the baking sheets for even browning.