Shuck corn and remove tassels and silks. With a sharp knife, slice off kernels into a large bowl or onto a plate. (Yields about 10 cups.)
In two batches, use a blender or food processor to purée the kernels, accumulated juices and thyme with a total of 2½ cups of water. Mixture should be somewhat chunky.
In a large saucepan over medium-high heat, cook pureed corn with butter, 2 cups water, salt and thyme, until butter has melted and soup is heated through, about 5 to 10 minutes.
Serve hot. Garnish with tortilla chips, lime wedges or avocado. Sprinkle with freshly cracked pepper.
Store in an airtight container in the fridge for up to one week.