"Slightly Gingery. The Ed Sheeran of cookies,” says the sign at Trader Joe’s.  Can you guess? Speculoos, aka biscoff cookies.   Now, I’m late to the biscoff  cookie crazy. I’ve never really flown Delta, which is where a lot of people first encountered a 2-pack of those cinnamony, gingersnappy cookies. Long known in Belgium, those little cookies have been one of the positives airline passengers can point to about flying in the last few years.

Gingersnaps have been a favorite of mine since childhood, thanks to little purple bags of Pogen's cookies.  But I never paid much mind to speculoos. I mean, I’ve had a packet of them in my cupboard for the last several months, just languishing. So when I bumped into this blueberry mascarpone tart with a speculoos cookie crust, a light flicked on in my head. Speculoos cookies would be perfect for ice cream sandwiches.