> These exist in the US, but they're called black and white cookies.
Most images of Amerikaner, like that on Wikipedia [1], are potentially misleading because they only show the upper side, so it looks like a cookie with frosting. But in actuality, the dough is not flat and evenly distributed like in a cookie, but gets much thicker in the center, see e.g. [2]. Not like a cookie at all.
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