Chinsuko (ちんすこう/金楚糕, Chinsukō) is a traditional sweet made in Okinawa since the times of the Ryukyu Kingdom, and often sold as a souvenir (Miyagegashi).

It is a small biscuit made of mostly lard and flour, with a mild and sweet flavor similar to shortbread.

[1] The precise origin of Chinsuko is unclear, but multiple baked confections of the time are seen as possible candidates of inspiration.

[2] Castella, a sponge cake variant brought over by Portuguese merchants which was adopted into both Chinese and Japanese cuisine is another contender.

Another theory has Chinsuko as the result of attempts to replicate Portuguese bolo as brought over by the Silk Road using materials available in Okinawa.