- Boil 2 cup sweet corn kernels in water for 5 minutes. drain off the kernels and transfer to kadai. add in 1 tsp butter and roast on medium flame for 2 minutes. roast till the kernels turn aromatic and flavourful. transfer to a bowl and cool for 5 minutes. add in ¼ tsp chilli powder, ¼ tsp cumin powder, ¾ tsp chaat masala, ¼ tsp salt and 2 tbsp lemon juice. mix well making sure everything is combined well. finally, transfer the spicy corn chaat into cup and serve.