The dark blue color imparted by the banana leaf and the shape of the fold leads some to call this dessert blue drawers.
2015, Linda Bladholm, Latin & Caribbean Grocery Stores Demystified, page 343:
The mixtures are wrapped and tied in banana leaf parcels and steamed. Names for these steamed cakes are boyo, duckoono, tie-a-leaf, and blue drawers, as the leaf stains the pudding a faint bluish color.
2022, Kimberly J. Morse, The Americas: an Encyclopedia of Culture and Society, page 587:
Blue drawers, also known as tie-a-leaf or dukunu, combine banana, coconut, sweet potato, and/or cornmeal in small squares, that are then wrapped in banana leaves and boiled for an hour.
