Good news for choccie fans.
Tenerife's famous chocolate and cake makers, El Aderno have opened a shop/café in La Paz in Puerto de la Cruz. El Aderno have made chocs for King Juan Carlos and some of Spain's top chefs.
I can vouch from first hand experience that their sweets and chocolates are addictively good. The shop is near the pharmacy in the main shopping centre. It also has a chocolate cave - it's not actually a cave but a 'chilled' area to keep the goodies at their best - but it sounds good :)