Make the dressing by stirring together all ingredients. If you have a squeeze bottle, use it to dispense the dressing for an ideal appearance.
Slice the corn off the cob and add it to a skillet over high heat along with the butter. Once the butter is melted, toss in the chili powder, and garlic powder as well. Fry, stirring often, until the kernels are lightly browned. Remove from heat.
Slice the head of lettuce into quarters, removing the stem. Place one quarter on each plate. Squeeze dressing over the lettuce and then top generously with fried corn, cotija cheese, and cilantro.