In a microwave safe bowl, heat the milk in the microwave for 1 minute until heated to 110℉. Add the yeast and sprinkle of sugar to the top. This helps to bloom the yeast to start the activation process. Let it sit for 10 minutes it will look frothy on top.
1 cup Milk, 2 1/4 tsp Active dry yeast, Sprinkle of sugar
These instructions are for a stand mixer with a dough hook, for making by hand instructions see notes. In a large bowl, sift the flour and cocoa powder together. Add in sugar, salt, lightly beaten eggs, milk/yeast mixture, and cubed butter.
4 cups All-purpose flour, 1/2 cup Unsweetened cocoa powder, 1/4 cup White granulated sugar, 1 tsp Salt, 2 Large eggs, 10 TBSP Unsalted butter
Using a mixer and mix on low speed until a dough starts to form. Switch to medium speed and knead for 5 minutes. The dough will feel tacky but not stick to your hands. It is ready when you pull a small piece of dough thinly with your hands. If you see light through it, then the gluten has been formed enough.
Preheat the oven to 200℉. Spray a large bowl lightly with nonstick spray. Place the dough ball into the bowl. Add a clean kitchen towel. Place in the oven, turn off the oven, crack open the door, and let rise for 1 hour. It will double in size.