Boil 250 grams of sweet corn kernels in a pot of water for 5-7 minutes until they are cooked and tender. Drain the water and set the corn aside.
In a small bowl, mix 1 teaspoon chaat masala, 1/2 teaspoon red chili powder, 1/4 teaspoon black pepper powder, and salt to taste.
Heat 1 tablespoon butter in a pan over medium heat. Add the boiled corn kernels and sauté for 2-3 minutes.
Add the spice mixture to the corn and mix well, ensuring that the corn kernels are evenly coated with the spices.
Cook for another 2-3 minutes, stirring occasionally.
Turn off the heat and transfer the masala corn to a serving bowl. Squeeze the juice of half a lemon over the corn and garnish with 1 tablespoon chopped coriander leaves. Serve hot.