Churros, the long, skinny, crenellated, sweet fried crullers made from just flour, water and salt, have been enjoyed for centuries in Spain, with hot chocolate and without. However, in Barcelona, xurros, as they are called in Catalan, are becoming an endangered species. In recent years, more than half of the xurrerias in the city have disappeared. Many of the old-timer xurreros who still survive have the odds stacked against them: permit renewal for a street stall is near impossible; rent has become prohibitively expensive and continues to increase; or required updates to old infrastructure might prove extremely costly. However, we know of one young newcomer who has emerged with fresh energy and inspiration, incorporating lessons from the masters in his creative take on xurros. The best way to save this endangered species is to eat it, so here are our five favorite xurrerias, which make these star-shaped doughnuts with great care – and with delicious results that are worth seeking out.

Editor's note: Our third installment in the Global Bar Crawl takes us to Barcelona, where gin continues to be the drink of choice among locals. Tomorrow we head to a spot in Istanbul where you can spend an evening visiting a number of bars, all without leaving the building. Spain is a country that loves a long-drink – alcohol in combination with a soft drink, refreshing and open to invention and reinvention. On the heels of creative gastronomy’s efflorescence in recent years, many old drinks, cuisines and forgotten ingredients have returned, revived through new and more sophisticated techniques and interpretations. The gin and tonic, called gintonic here, is one such Spanish obsession, and all that ingenuity and focus have gone into taking this highball to the next level.

Deep in the heart of El Born lies a medieval labyrinth of dark stone buildings and massive wooden doors, scant light, narrow passageways and dozens of colorful little shops, ateliers and hidden bars and restaurants. Of the last, La Cua Curta is one of our favorites, a family restaurant specializing in cheese fondue, unusual salads, carpaccios of meat and fish, homemade pâtés and a remarkable veal steak.

Morro Fi and Mitja Vida are two relatively new entrants to Barcelona’s vermuteo (“vermouthing”) culture, whose history stretches back to the turn of the last century. These two bars are the product of nostalgia for a bygone era fused with the social network- and urban design-driven present. The vermouth tradition in Barcelona was started in the early 20th century by Flaminio Mezzalama, who represented the Italian company Martini & Rossi in Spain, at his fabulous modernist Bar Torino. Vermut began to be produced in Catalonia, and in the following decades, the province developed its own style of the aromatic fortified drink. At the same time, the custom arose of having vermut before lunch with some pickles to whet one’s appetite. That tradition faded over time but has emerged in recent years as a kind of retro, hipster-approved pastime.

Dear Culinary Backstreets,We are traveling with a group of friends to Barcelona. A few of us are vegetarians, and we all love good food. I know Barcelona is a meat – and particularly pork – lover’s paradise, but can you recommend any vegetarian-friendly restaurants? Is it possible to enjoy tapas and Spanish cuisine without meat or fish?

Editor’s note: We regret to report that La Portería has closed. Looks can be deceiving. A case in point: La Portería appears dull at first glance, but venture down the few steps that separate this singular restaurant from the street’s frivolity and you will be rewarded.

Fried pig’s ears fortified with garlic and parsley, veal cheek and tongue laced with vinaigrette, hefty veal and pork meatballs, creamy artichoke or eggplant omelets or a hearty bocadillo of marinated tuna, red pepper, anchovies and olives: these esmorzars de forquilla, or “fork breakfasts,” are how a Catalonian might start his day – especially at Can Ros, a tapas-and-bocadillos joint that’s open every day from 7 a.m. until midnight. Office workers might drop by for a coffee at mid-morning, followed by the lunch crowd, which takes over from 2 p.m. to 4 p.m. Dinner, of course, lasts well into the night. It’s breakfast, however, that has made Can Ros most popular among locals.

A hidden culinary sanctuary, El Passadís del Pep may be located in one of the most visited quarters of Barcelona, but it’s out of sight of anyone who isn’t looking for it. Once you go down the long corridor that leads to the restaurant, you don’t need to do anything, and that includes choosing what to eat. From the moment you sit down, the “house” offers you your first bottle of cava, and the celebration of food and life begins. There is no menu and there are no “daily specials,” just whatever Joan Manubens and his team decide to cook that day.

Editor’s note: This post is the second installment of “Best Bites of 2013,” a roundup of our top culinary experiences over the last year. Stay tuned for “Best Bites” from all of the cities Culinary Backstreets covers. Forn Baluard We started the year off heating our hands near the wood-fired oven at Forn Baluard, one of Barcelona’s top bakeries. It hasn’t been around long, but it has decades of experience in its DNA, as it’s headed up by Anna Bellsolà, a fourth-generation baker.

Typically eaten at Christmastime in Spain, turrón (a type of nougat) originated centuries ago. Some historians believe it was a sweet paste with nuts eaten by athletes in ancient Rome, while others trace its origins to a more elaborate medieval Arab delicacy that combined various toasted nuts with spices and honey.

Now that ski season has begun in Catalonia, thousands of Barcelonans make the pilgrimage every weekend to the Pyrenees. But winter sports are not the only draw; this is also the time to enjoy the cooking at masias, traditional farm buildings that have been converted into restaurants.There, the smells of winter stews and dishes made with mushrooms, game, mongetes (beans) and butifarra (a kind of pork sausage) are motivation enough to arrive at the village early and in one piece.

When we think of white wine in Catalonia, we think of its seemingly endless possibilities. Production of whites here has a 2,000-year-old history. The wide-ranging diversity in the area’s Mediterranean climate and calcareous soils, from the mountains to the sea, and the combination of old grape varieties and newly introduced “foreigners” with traditional and experimental methods of production make for innumerable styles and no taboos. Who knew white was a color with so many variations? The traditional Catalan grape varieties used to make white wine are mainly macabeo, xarel-lo, parellada and garnatxa blanca, but this area of Spain has the largest number of white grapes included in all its protected appellations (D.O.). Where other Spanish D.O.s usually are deeply defined by one or a few varieties, in the Catalunya D.O. there are more than 16 allowed – 35 counting the reds. In fact, this umbrella appellation, which covers wines that do not fall under the 10 subregion designations (Montsant, Penedès, etc.), was created to allow the use of all the grapes of the other Catalan designations in the entire area. It implicitly gives freedom to Catalan winemakers to express more than the old narrower conceptions of terroir and opens the doors to experimentation.

[Editor's note: We're sorry to report that Vell Poblenou has closed.] When people think of rice and Spain, they think of paella. In Barcelona there are hundreds of places to eat paella. And every Thursday you can find it on the menú del día at most restaurants across the city. There’s more to Spanish rice dishes than just paella, though. The word “paella” didn’t even appear until the 18th century; recipe books from the Middle Ages talk only of rice, and particularly the Valencian and Catalan kinds. In fact, “paella” originally referred to the pan used to cook the grain, but eventually came to describe the dish as we know it: rice prepared so that the water or broth completely evaporates and sometimes is left with a toasted layer on the bottom.

Editor’s note: We regret to report that Taverna Can Roca has closed. In the neighborhood of Sant Andreu we encounter very few city visitors wandering the cobbled streets or peering at the 19th-century two-story houses that pepper this district. Through the doors of Taverna Can Roca, we find even fewer. This is a place that can be considered muy del barrio.

We’ve written a great deal about all thetraditionalCatalan, Basque and Spanish food around town, but what about the modern, globally influenced cooking that’s taken hold in the food capitals of the world – of which Barcelona is certainly one? La Pepita is a prime specimen, with its passionate, creative young owners and food that, while anchored in the tapas tradition, reinterprets classic dishes through the cross-pollination of other cultures’ ingredients and ideas.