Preheat your oven or air fryer to 425F.
Spread fries on a baking sheet. Drizzle oil, sprinkle paprika, Cajun seasoning, garlic powder, and salt. Toss well.
Bake or air fry until golden and crispy.
In a bowl, whisk together the mayo, Cajun seasoning, hot sauce, paprika, garlic powder, onion powder, mustard, vinegar, and sugar. Taste and adjust heat or tang.
Melt cheese on the hot fries, or warm it slightly on the stove until creamy.
Pile the fries onto a plate.
Pour the voodoo sauce generously over the top.
Add jalapenos, green onions, bacon, or any toppings you love.
Serve hot and messy — the only proper way.