Preheat your oven to 350°F (175°C).
In a skillet over medium heat, cook the ground beef until fully browned. Drain excess fat.
Stir in the cream of mushroom soup, milk, garlic powder, onion powder, salt, and pepper until well combined.
Spread the beef mixture evenly in a greased baking dish.
Layer the drained corn over the beef mixture, then sprinkle the shredded cheese evenly on top.
Arrange the frozen tater tots in a single layer over the cheese.
Bake for 30–35 minutes, until the tater tots are golden and crispy.
Let the Cowboy Casserole recipe cool for a few minutes before serving.