Bake cookies for allies using Dark Ether Cane and other ingredients.
Crow can be found in the H.E.L.M. and prefers Bittersweet Biscotti, which uses Dark Ether Cane and Balanced Flavors.
Elsie Bray can be found on Europa and prefers Starwort Thins, which use Dark Ether Cane and Dark Frosting.
Petra Venj can be found in the Dreaming City and prefers Ill-Fortune Cookies, which use Dark Ether Cane and Impossible Heat.
Dark Ether Cane can be gathered by defeating Scorn combatants.
Additional information about ingredient source and usage can be found by viewing the details screen on Eva's Holiday Oven 2.1.