Meringue of made from eggs, so this is a breakfast sandwich.
Biscuits
Posts about biscuits! We also allow Jaffa Cakes (even though they aren't biscuits, they are in the biscuit aisle, create a [META] post if you want to argue this point), chocolate biscuits and biscuit-adjacent content.
See also !tea@feddit.uk
if you ask the French, a biscuit is a kind of gâteau (cake) and mostly refer to dry biscuits. The etymology of Biscuit (bi = two, cuit = cooked), means that it would spend twice longer in the oven, hence its dryness. So, macarons are cakes, not biscuits, because they are not dry. BUT! there are many kinds of macarons and some more traditional are actually quite dry (example here: https://www.macaron-de-nancy.com/fr/92-le-macaron). So it depends which ones you're thinking of.
Fat cookie
Think this: in Ukrainian we call pasta -- macarony.
Macaroni was the most common word for pasta in English too (at least in American English) for a long time after its introduction from Italy.
That and macaroon/macaron seem to both come from the same Italian source, per Etymonlone, which calls macaroons cakes: https://www.etymonline.com/word/macaroon