The finished pancakes will have a sweet, low-key corn flavor, and the more regular milk you replace with corn milk, the more pronounced that flavor will be.
Corn ice cream starts by pureeing corn and pressing out the milk. Tweak the flavor by adding ingredients like honey, or savory herbs like thyme, sage, or basil.
Onions and sweet peppers provide a savory base of flavor, cherry tomatoes bring juiciness and acidity, and salt, pepper, other herbs or spices will round out the dish.