They're butter cookies from Samar, by Charito's Delight.
The cookies are not too hard and not crumbly. And they're delicious! The sweetness is just right, and one can really taste the butter and egg flavors. We personally enjoy eating the slightly burnt ones because the charred flavor adds some depth.
Perfect partner: coffee.
We got the box of Corioso as a gift. If you want to know where to buy these yummy cookies, contact Charito's Delight.