One ear of corn at a time, place the corn directly on your stovetop's grate. Turn the heat on medium heat. Using metal tongs, turn the ear of corn only after it chars on each side until the whole piece of corn is charred all around. Set aside to cool.
Add avocados to a bowl and mash until creamy. Add in diced onions, diced jalapeño pepper, minced garlic, chopped cilantro and fresh lime juice. Season with 1 teaspoon of kosher salt (optional: add more salt to your taste).
Once the corn is cool to the touch, use a large sharp knife to cut off the kernels and add them to your guacamole. Mix until evenly distributed and enjoy!
Tip: save your avocado pits if you plan to store the guacamole in the fridge and add the pit(s) back to your guacamole. Remove when serving.