¼cup(57grams)unsalted butterdoes not need to be room temperature
¼cup(60mL)heavy creamdoes not need to be room temperature
⅔cup(4oz)semi-sweet chocolate chips
⅓cup(40grams)powdered sugar
3tbsp(15grams)unsweetened cocoa powderregular, not dutch-processed
Instructions
Dough
In the bowl of a stand mixer, whisk together the flour, sugar and yeast. Add the eggs, milk, salt and nutmeg. Using the dough hook attachment, mix on low-medium speed until a dough forms, 1-2 minutes.
On medium speed, add the butter, tablespoon by tablespoon, waiting until each tablespoon is incorporated before adding another one. Once all the butter is added and combined, bump up the speed to medium-high and knead for 10 minutes. The dough will be sticky but smooth and stretchy. It should be slightly sticking to the bottom of the bowl, but not the sides.
Place the dough in a well-oiled bowl, cover, and let rise for about 3 hours, or until the dough has doubled in size (as shown below). Because this dough has more fat, it will take longer to rise than other yeast doughs.
Filling
Once the dough has about 30 minutes left to rise, make the filling. Combine the butter and heavy cream in a sauce pan over the stove on medium heat. Stir until the butter has completely melted and the mixture is simmering.
Once simmering, add the chocolate and stir until the chocolate is melted and combined, then remove the pan from the heat.
Add the powdered sugar and cocoa powder and whisk until the mixture is smooth. Pour the filling into a wide and shallow bowl (this will help the filling cool more evenly and faster) and place in the fridge for 20-30 minutes.
Rolling out the dough
Prepare a 9x5 inch loaf pan by lining it with parchment paper.
Once the dough has doubled in size, roll out the dough on a lightly floured surface into a 12x16 inch rectangle.
Once the filling has chilled to a paste-like consistency, spread it onto the rolled out dough into an even layer, leaving a 1 inch margin on the sides.
Starting on the short side, tightly roll up the dough into a log.
Then, cut the dough in half length wise.
Cut sides up, place both halves into the prepared loaf pan and begin weaving the two pieces together (over under, over under). Cover and let rise for an additional 30-40 minutes until it is puffy.
Baking
When the dough has 10 minutes left to rise in the pan, preheat your oven to 350 degrees.
Lightly beat an egg and brush the dough with the egg wash. Bake for 40-45 minutes until the edges are golden brown and a tooth pick inserted into the center comes out with no resistance. Let cool in the pan, slice, and enjoy!