For organic food, stop at Boqueria Market, Barcelona's favorite shopping destination. It is usually crowded, and full of tourists, but the value is there, nevertheless. Watch out for pickpockets. If you like Spanish delicacies like the world famous Jamon Serrano, head over to Jamonísimo in Eixample, which sells the best ham and chorizos. For gourmet chocolate my recommendations are Papabubble and Cacao Sampaka.