In the bowl of your stand mixer with dough hook attached, add bread flour, whole wheat flour, instant yeast, salt, molasses, honey, cocoa powder, brown sugar and water. Mix on low until a rough dough comes together.
Add in your 28g/2 tbsp of butter in two chunks and mix until completely worked into the dough. Continue to let the dough knead until smooth and elastic.
Remove your dough from the bowl, shape into a ball and lightly grease the inside of your bowl with cooking spray.
Replace the dough into the greased bowl and cover. Place into a warm spot until dough has nearly doubled in size (2-3 hours).
Line a 9x9 baking pan with parchment.
When dough is ready, punch down the dough and move to your work space.
Divide the dough into 12 equal portions.
I chose to shape these into more of a rectangular shape than traditional round rolls but you can shape however you want. Take each portion of dough and flatten down. Fold in the sides like a letter, then fold the opposite ends in together and pinch to seal. Roll the seam side down and cupping your hand over the dough roll back and forth to create a sort of cylinder shape. Use your fingers to push the short ends in slightly to create a more flat end, creating a rectangle. Place in your lined pan and repeat with the rest of the dough.
Cover your pan and allow to rise for 30-45 minutes in a warm area.
While your dough is proofing, preheat your oven to 350°F
When dough is ready, brush the tops with beaten egg and sprinkle rolled oats over the tops.
Place in the oven on the center rack and bake for about 25 minutes. Bread will be difficult to tell browning level but if tapped they should sound hollow, and an internal thermometer should read at least 180°F.
Remove from oven, and remove from pan onto a wire cooling rack immediately. Let bread cool for 20-30 minutes before serving/enjoying. Store in an airtight container for up to 3-5 days. Enjoy!
Optional - In a small bowl, add your softened butter, powdered sugar, cinnamon and brown sugar and mix until cohesive and smooth. Serve with rolls.
