Had some excellent meals on a 3 day business trip to Budapest.
Voros es Feher (Andrassy, near opera)
Bistro run by Budapest wine society. Lots of very good reasonably priced wine as you might expect. Short (by Budapest standards) menu with some top notch choices. I had a fall-off-the-bone tender and juicy goose leg confit, foie gras, ewe's milk cheese w/ stewed veggies, and a chocolate souffle to die for. Recent good review in NYT fully justified.
Mokka (Sas, near St. Stephens)
Hip/funky place with lively bar, good service, and extensive fusion menu with some good choices. Had a kind of veggie mezze appetizer which was good but nothing special, and very interesting rack of lamb encrusted in poppy seeds with a spinnach torte.
Alabardos. Small elegant restaurant with mideval decorations in a 15th Century building in Buda near Matthias church). Super attentive service, fancy presentation under silver platter covers, very knowledgeable but non-pretentious wine server, and excellent food. Baked goose liver appetizer that melted in my mouth in a creative presentation w/ apples and pumpkin, venison flambe with sour cherries and a wild mushroom torte. Wow.
Four Seasons Gresham Palace Coffee House Restaurant
Great atmosphere in the meticulously restored palace with views of the river, an elegant copper bar, etc. Had a very nice chicken paprika with a fancy presentation and a top notch cup of coffee.
Tom George. Sleek fusion place and the only (minor) disappointment of the trip despite a positive NYT writeup. Had a pasta dish with walnuts that was nothing special.