Combine the chilli powder, garlic powder, cumin, paprika, salt, and pepper. Add the oil and mix to create a paste.
Pre-heat BBQ. Remove any string or husk from corn and then use a brush to spread the paste all over each. Wrap each corn in foil and place on the BBQ. Be sure to turn every 10- 15mins until slightly soft and lightly charred.
Remove from foil. If needed, cook uncovered for another 5 mins. Remove from BBQ, drizzle with lemon juice and sprinkle with cheese or chives to finish.