Nitpicking, the plural is eieren, with three distinct syllables :) IIRC, there used to both words with -er and -en as plural, but over time the norm became -en

Nitpicking, the plural is eieren, with three distinct syllables :) IIRC, there used to both words with -er and -en as plural, but over time the norm became -en so it was tacked onto the -er. Like kind/kinderen. In German Kinder and Eier are still the plural.