Which pastry offers a combination of chocolate and almond flavors at Porto's?

The chocolate almond croissant is distinctively designed to offer the rich flavors of both chocolate and almond in one delightful pastry. The croissant itself is made from flaky layers of buttery dough, which is then filled with a combination of almond cream or frangipane and pieces of chocolate. This creates a perfect balance where the nutty flavor of almonds complements the sweetness of the chocolate, providing a harmonious taste experience that highlights both ingredients.

While the other choices involve chocolate or almonds, they do not combine both flavors in the same way. The chocolate croissant focuses on chocolate alone, the chocolate danish is typically centered on chocolate with a different type of pastry assembly, and the almond tart primarily showcases almond flavors without incorporating chocolate. Therefore, the chocolate almond croissant stands out as the pastry that fully integrates both flavors, making it the correct answer.