Any ideas on her breed?

[drumstick diva]

agree with Junebuggena

 

[jolly wattles]

Olive Egger projects usually consist of a blue laying breed, like Easter Eggers or Ameraucana, and dark brown layers, like Marans (most likely due to the solid black coloring) or Welsummer. Your girl is likely second or third generation Marans/Easter Egger cross. The blue shell gene (to produce green eggs) is usually inherited with the pea comb gene. With her single comb from the Marans ancestor, brown is to be expected.

I believe that's the case here. Thanks