The dough is mixed with white wine instead of just butter, which is what gives these biscuits their dry, crumbly snap rather than a soft shortbread texture.
Canistrelli are dry, diamond-shaped biscuits made with olive oil or butter, white wine, and flavorings like lemon, anise, or chestnut flour, baked until firm and slightly crumbly. Market stalls across Corsica sell them by the paper bag, stacked in tall piles.