Preheat oven to 350°F. Lightly grease a 13x9-inch baking dish with butter or non-stick cooking spray. Set aside.
In a medium pot, cook elbow macaroni according to package directions until al dente. Drain and set aside.
In a large skillet, melt butter over medium heat. Add flour and whisk until smooth, about 1-2 minutes.
Whisk in cream, evaporated milk, milk, and seasonings.
Once bubbles appear at the edge of the pan, add the queso blanco cheese dip, 1 ½ cups of white cheddar cheese, and 1 ½ cups of the pepper jack cheese. Fold and mix until smooth.
Add the cooked macaroni to the cheese sauce, and toss to coat. Transfer to the prepared baking dish and cover with foil.
Bake 20 minutes, remove foil and top with the remaining shredded cheeses. Return to oven and bake for another 5-10 minutes, or until it’s starting to brown and is bubbling at the edges. Garnish as desired and serve immediately.