About 15 to 20 minutes. Sticky corn is expected to cook for about 15 to 20 minutes after the water boils from thawing and then cooking in a pot, so sticky corn usually takes about 15 to 20 minutes to cook. Be sure to cook the corn along with the husk. Because the corn skin contains natural pigments and will absorb the water, you can make the corn cooked out of the color more bright and more fragrant and soft.