In a large mixing bowl, combine the rye flour, whole wheat flour, bread flour, cocoa powder, instant coffee, caraway seeds, and salt.
In a separate bowl, dissolve the yeast in warm water and let it sit for about 5 minutes until it becomes frothy.
Add the molasses to the yeast mixture and stir well.
Pour the yeast mixture into the dry ingredients and mix until a dough forms.
Knead the dough on a floured surface for about 10 minutes until it becomes smooth and elastic.
Place the dough in a greased bowl, cover it with a damp cloth, and let it rise in a warm place for about 1.5 hours or until it has doubled in size.
Preheat your oven to 375°F (190°C).
Punch down the dough and shape it into a loaf. Place it in a greased loaf pan.
Cover the loaf pan with a damp cloth and let it rise for another 30 minutes.
Bake in the preheated oven for 45 minutes or until the bread sounds hollow when tapped.
Remove from the oven and let it cool on a wire rack before slicing.