From Dutch kruller (“cruller”), from krullen (“to curl”).
cruller (plural crullers)
- (US) A donut in the form of a twisted ring.
- Synonym: wonder
1872, James Parton, The Life of Horace Greeley:
"Take a cruller, any way," said she, handing him a cake-basket containing a dozen or so of those unspeakable, Dutch indigestibles.