Peel back the husks of the sweetcorn, leaving them attached to the cobs.
Remove the silky bits and wash the cobs well.
Mix the chaat masala and chilli powder in a small bowl.
Preheat the barbecue.
Grill the sweetcorn directly over a high heat, turning often with the leaves, until lightly charred all over.
When cooked, smear each cob with butter or crème fraîche.
Serve the sweetcorn with the lemon wedges and a little mound of the spice blend on the side.
Dip the wedge in the spices and rub them over the sweetcorn, squeezing a little lemon juice on as you do and serve.
