Grilled Mexican Street Corn (Elote)

Bahan-bahan (4 porsi)

• ¼ cup mayonnaise, (best quality such as Hellmann's or Duke's)
• ¼ cup sour cream
• 1 tablespoon fresh lime juice, (from 1 lime, plus lime wedges for serving)
• 1 small clove garlic, (minced)
• ½ teaspoon salt
• ¼ teaspoon sugar
• 8 ears corn, (shucked)
• 1 cup finely crumbled cotija cheese ((see note))
• ⅓ cup finely chopped fresh cilantro
• Chipotle chile powder, (for sprinkling)