I recently bought The Mediterranean Diet Cookbook for Beginners, by Elena Paravantes, RDN, who writes the blog Olive Tomato. On Friday, I baked the Olive Oil Greek Yogurt Brownies. The recipe did not specify what type of cocoa, but as it used baking powder, I used dutched chocolate, I used nonfat rather than 2% Greek yogurt, as that is what I have in the refrigerator. I substituted white whole wheat flour for the AP. My other change was to add 1 tsp. espresso powder. We sampled these brownies for dessert tonight; they have a rich, chocolaty taste and are between cakey and fudgy. I will bake these brownies again with the changes I made.