Questions & Answers about В булочках с изюмом мне не хватает корицы, зато мой брат их обожает.
В булочках is the prepositional plural form of булочка.
- булочка = a bun / sweet roll
- в булочке = in a bun
- в булочках = in buns
It is plural because the sentence is talking about raisin buns in general, not one specific bun. Russian often uses the plural this way when speaking about a type of food.
After с meaning with, Russian normally uses the instrumental case.
- изюм = raisins
- с изюмом = with raisins
So булочки с изюмом literally means buns with raisins, which is the natural Russian way to say raisin buns.