Preheat the oven to 375 degrees.
Dice the jalapeño. If using fresh corn, cut the corn kernels from the cob.
In a medium mixing bowl, add jalapeño, sour cream, cream cheese, mayonnaise, cheddar cheese, corn, taco seasoning and salt and pepper. Mix the ingredients together thoroughly.
Spoon the mixture in a prepared baking dish.
Bake the dip for 25-30 minutes or until the top is golden brown and bubbly.
Remove from oven and allow dip to cool about 5 minutes. Serve with tortilla chips, fresh veggies or celery sticks.