For quick morning snacks try Túrós táska (pastry filled with cottage cheese) or Kakós csiga (cocoa snail: rolled pastry filled with chocolate) pastries from bakeries.
Lángos, a round, deep-fried dough is a savoury snack that you can get at food stalls in vegetable markets. Pogácsa, a kind of salty biscuit with various flavourings (cracklings, cheese, cabbage) is another option for a quick bite.