MAST is what happens when two fine-dining sommeliers open their own room. On a quiet stretch of Porzellangasse, it pours an experimental list of natural and Austrian wine and feeds it with seasonal bistro cooking that earns its own quiet acclaim.
Published March 23, 2026 · By Daniel Okafor
MAST Weinbistro sits at Porzellangasse 53 in the elegantly sleepy ninth district of Alsergrund, run by Matthias Pitra and Steve Breitzke, two former fine-dining sommeliers. The Michelin Guide lists it with a Bib Gourmand and a Green Star, crediting a kitchen led by chef Lukas Lacina that turns local sourcing into seasonal bistro plates. It reads as a wine bar with a restaurant's discipline.
Who would love it: the curious wine drinker who wants natural and conventional bottles side by side. Who would skip it: anyone after a big-name cocktail list, since the focus here is the glass of wine.
The room
The bistro sits in a historic town house, built around a polished wraparound wooden counter lit by pendant bulbs, with the by-the-glass pours staged along it. The feel is contemporary and warm rather than formal, a room that suits a seat at the counter as much as a table. Scale is small, which keeps the service close and the wine talk easy. It is a bistro you settle into, not pass through.
What to order
Start with the by-the-glass list, about half Austrian and half foreign, spanning conventional and natural producers, with Georgian bottles among the more experimental picks. Let the seasonal kitchen guide the food, since the menu shifts with what local producers send. Michelin singles out the value, so a glass-led dinner here lands softer than the cooking suggests. Ask the sommelier-owners to steer the pairing.
The crowd and best time to go
The crowd skews to Vienna wine lovers, Alsergrund locals, and visitors who track natural-wine rooms. MAST closes Monday and Tuesday, runs lunch and dinner Wednesday to Friday, and dinner only at the weekend, so plan around that. Early dinner is the calm window; later sittings fill the small room. A weekend booking is worth making given the size.
The detail worth knowing
The Michelin recognition is worth reading closely. MAST holds a Bib Gourmand for value and a Green Star for sustainability, an unusual pairing that signals both a fair bill and a kitchen serious about its sourcing. The setting backs it up, a historic Porzellangasse town house in the ninth district where the wraparound counter, not a dining room, sets the tone. The list itself is the experiment, roughly half Austrian and half foreign, leaning into natural producers and stretching as far as Georgian bottles that rarely show up by the glass elsewhere in Vienna. For a room run by two former fine-dining sommeliers, the surprise is how unstuffy the whole thing feels.
Who it is for
This is for the wine explorer, the natural-wine convert, and anyone working through Vienna wine bars who wants a sommelier's list in a bistro setting. Skip it for a quick drink or a large party. For the wider city, see the full Vienna bar guide and our best wine bars worldwide guide.
The verdict
MAST wins on the strength of its list and the discipline behind it, a sommelier-run bistro where the by-the-glass pours and the seasonal kitchen pull in the same direction. Come for a counter seat, order by the glass, and let the owners lead. For more Vienna wine, compare the long-running Unger und Klein and the natural list at Vinifero.
