Shauna, Here is one cocoa bread recipe and yes it does have cocoab ut I do not know if it is Jamacian or not.
Angel

Cocoa Bread

Ingredients (6 servings)
5 1/2 c Flour
1 Cake compressed yeast
OR 1 cake dry yeast
2 c Milk, scalded and cooled
1/2 ts Salt
1/2 c Cocoa
1/4 c Shortening
2 Eggs, well beaten
1/2 c Sugar

Instructions
Soften yeast and dissolve 1 tablespoon sugar in lukewarm milk.
Add 3 cups flour and beat until smooth.
Cover and set aside to rise in a warm place until light.
Add shortening and sugar, which have been creamed together, eggs, cocoa, salt, and remainder of flour or enough to make a soft dough.
Knead lightly and place in well-oiled bowl.
Cover and set in a warm place until double in bulk - about 2 hours.
Form into loaves.
Place in well-oiled bread pans, filling them 1/2 full.
Cover and let rise again until double in bulk.
Bake in hot oven (425° F) 40- 50 minutes.
2 loaves.
The Household Searchlight - 1941