You know what it looks like… but what is it called?
TAKE THE QUIZ“Battenberg”
The following 2 entries include the term Battenberg.
Battenberg cake
noun: a rectangular cake that is usually covered with marzipan and that is assembled from two differently colored sponge cakes so that a slice of the cake has a checkered pattern
Battenberg lace
noun: renaissance lace
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Merriam-Webster unabridged