Preheat your oven to 350°F.
In a large mixing bowl, combine the softened cream cheese, shredded cheddar cheese, and sour cream. Mix until smooth and well combined.
Add the gochujang, chopped spring onions, garlic powder, salt, black pepper, and lemon juice to the bowl. Stir until all ingredients are evenly incorporated.
Transfer the mixture to a baking dish and spread it out evenly.
Bake in the preheated oven for 20-25 minutes, or until the dip is bubbly and golden on top.
Remove from the oven and let it cool for a few minutes before serving.
Serve warm with tortilla chips, crackers, or fresh vegetables.