Today, I learned I was previously spelling Brussels sprout(s) incorrectly. I was not aware of the ending s on Brussels, nor was I aware of the capitalization.
Singular: Brussels sprout.
Plural: Brussels sprouts.
When used at the beginning of a sentence: Brussels sprouts are extremely tricky in nomenclature.
When used in the middle of a sentence: My taste buds were seduced by those amazing Brussels sprouts.
I apologize for my poor English.