羽二重 はぶたえ もちだったら
habutaemochidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 羽二重餅

1. If/when it was/is a *hachimaki* (headband); If/when it was/is a crepe (specifically a thin, layered one)

Tara Conditional