First, make the dough. In the bowl of a stand mixer with the paddle attachment, add the bread flour, cocoa powder, sugar, baking powder, yeast, and sea salt. Stir to combine.

Then, add in the warm water, milk, egg, and melted butter. Mix for 2 minutes or until a thick dough is formed. Spray a spatula with nonstick spray and scrape the dough down the sides of the bowl to the bottom. Cover with plastic wrap and refrigerate for 30 minutes.

After 30 minutes, remove the bowl from the fridge. Lightly flour a large cutting board topped with parchment paper. Lightly flour a rolling pin. Place the dough in the middle. Gently roll out into a rectangle that is about 12 inches long and 6 inches wide.

Next, make the filling. Combine the brown sugar and cinnamon in a bowl. Spread the melted butter all over the dough. Then, sprinkle the brown sugar cinnamon mixture on top. Sprinkle the chocolate chips evenly on top.

Use a pizza cutter to cut 6 long strips of dough that are each 1 inch wide. Carefully roll up each strip into a cinnamon roll. Place in a heavily sprayed baking dish.

Once all 6 rolls are in the baking dish, place a kitchen towel on top. Place in your oven with the oven light on for 1 hour (the oven will be OFF at this point).

After 1 hour, the rolls will have grown slightly in size. Remove from the oven and remove the towel. Preheat the oven to 350 degrees Fahrenheit. Once preheated, bake for 25 to 27 minutes, or until the edges are lightly bubbly.

Once the cinnamon rolls are just about done baking, make the frosting. Combine the powdered sugar, butter, vanilla, cream cheese, and cocoa powder. Use an electric mixer or stand mixer to beat until creamy.

Finally, remove the cinnamon rolls from the oven. While hot, top with the chocolate frosting and serve!