01 - Preheat the oven to 400°F. Grease a large 9x13 inch baking dish.
02 - Cook the macaroni in salted boiling water according to package instructions until just al dente. Drain and set aside.
03 - In a large saucepan over medium heat, melt 2 tbsp butter. Add flour and whisk for 1 minute to form a roux.
04 - Gradually whisk in the milk, stirring constantly until smooth and thickened, about 3-4 minutes.
05 - Add cream cheese and stir until melted. Add cheddar and Monterey Jack cheeses, stirring until fully melted and smooth.
06 - Stir in garlic powder, smoked paprika, salt, and pepper.
07 - Fold in the cooked macaroni, chopped pickles, diced jalapeños, and pickle brine. Mix until evenly coated.
08 - Transfer the mac and cheese mixture to the prepared baking dish.
09 - In a small bowl, combine panko breadcrumbs with melted butter and 1/2 cup cheddar cheese. Sprinkle evenly over the macaroni.
10 - Bake for 20-25 minutes, until the top is golden and bubbling. Let rest 5 minutes before serving.