Preheat oven to 400 degrees F. Lightly oil a large cast iron skillet or coat with nonstick spray.
Slice the raw kernels off the cobs into a large bowl. Stir in mayonnaise, Sriracha, sugar, 3/4 teaspoon salt and 1/4 teaspoon pepper.
Stir in 1 cup mozzarella.
Spread corn mixture into the prepared skillet; sprinkle with remaining 1 cup mozzarella.
Place into oven and bake until bubbly, about 15 minutes. Then broil for 2-3 minutes, or until golden brown.
Serve immediately, garnished with green onions, if desired.
Notes
Use fresh or canned corn. In-season fresh corn is a great option during the summer, but canned corn can also be used all year round. 2 (15.25-ounces) cans of drained corn kernels should do the trick, but dry the corn thoroughly with paper towels to avoid a watery dip.
Kewpie mayonnaise is key. Although traditional mayonnaise can be used in a pinch, Japanese kewpie mayonnaise will yield a corn dip that is much more rich and creamier in texture.
Freshly grated cheese goes a long way. Although pre-shredded cheese can save a few minutes in the kitchen, pre-shredded contains additives such as potato starch or cellulose, hindering its ability to melt properly. Freshly grated cheese will melt much better, resulting in a smoother cheese corn dip.
Skip the fresh mozzarella. Fresh mozzarella will be packed in water. Use low-moisture mozzarella cheese for that signature stringy cheese pull.
Use a cast iron skillet. Cast iron skillets retain heat much better than a nonstick skillet, allowing for even cooking.
Finish under the broiler. Broil for 2-3 minutes for that favorited golden, bubbly crust, keeping a close eye on it as it can burn quickly!