Step 1: Prepare the Fries

1. Preheat oven to 425°F (220°C) or heat frying oil to 350°F (175°C).
2. Cut potatoes into thin fries and soak in cold water for 30 minutes to remove excess starch.
3. Pat dry, toss with vegetable oil and salt, and spread evenly on a baking sheet.
4. Bake for 30-35 minutes, flipping halfway, or fry until golden and crispy.

Step 2: Make the Cajun Seasoning

1. In a small bowl, combine smoked paprika, cayenne pepper, garlic powder, onion powder, and black pepper.
2. Once the fries are cooked, toss them with the seasoning while still hot.

Step 3: Prepare the Cheese Sauce

1. In a saucepan over medium heat, melt butter and add heavy cream.
2. Stir in shredded cheddar cheese and Cajun seasoning, whisking continuously until smooth.
3. Remove from heat and keep warm.

Step 4: Assemble the Fries

1. Arrange the seasoned fries on a serving plate.
2. Drizzle warm cheese sauce over the fries.

Step 5: Add the Finishing Touches

1. Drizzle ranch dressing over the fries in a zig-zag pattern.
2. Sprinkle with chopped green onions and extra Cajun seasoning.
3. Serve immediately and enjoy!