Cut the corn kernels off of the cobs and discard the cobs.
Heat a large skillet over medium heat and add the butter. Once melted toss in the corn kernels and garlic, stirring occasionally until the corn has charred slightly. (about 4 minutes).
Remove the corn from the heat and place in a bowl. Stir in the mayo, sour cream, chili powder and cilantro. Add the cotija cheese and avocado and gently stir to combine.
Squeeze fresh lime juice over the top and serve warm with corn chips. Enjoy!
Notes
You can easily double this recipe to serve a larger crowd. This dip is also a great side dish!