In a large mixing bowl, combine the softened cream cheese, sour cream, and shredded cheddar cheese. Use a spatula to mix until smooth and creamy. This ensures that the dip has a consistent texture.

Add the sweet corn and diced jalapeños to the cheese mixture. Stir gently to combine, being careful not to break the corn kernels.

Sprinkle the garlic powder, onion powder, cumin, salt, and black pepper over the corn mixture. Stir well to ensure the spices are evenly distributed throughout the dip.

Preheat your oven to 350°F (175°C). This temperature allows the dip to heat through and the cheese to melt without burning.

Transfer the dip mixture into a baking dish, spreading it out evenly. This helps it cook uniformly.

Bake in the preheated oven for 25-30 minutes, or until the dip is bubbly and lightly golden on top. This step enhances the flavors and creates a delicious crust.

Remove the dip from the oven and let it cool for a few minutes. This prevents burns from hot cheese.

Garnish with chopped cilantro and sliced green onions if desired. Serve warm with tortilla chips, crackers, or fresh vegetables.