In a large pot of boiling salted water, cook the elbow macaroni according to package instructions until al dente. Drain and set aside.
In the same pot, melt the butter over medium heat. Once melted, whisk in the flour and cook for about 1-2 minutes until golden and bubbly, stirring constantly.
Gradually pour in the milk while whisking continuously to avoid lumps. Continue to whisk for about 5 minutes, until the mixture thickens.
Lower the heat and stir in the smoked Gouda and sharp cheddar cheeses until completely melted and the sauce is smooth.
Add the Dijon mustard, garlic powder, smoked paprika, and season with salt and pepper to taste. Stir until well combined.
Add the cooked macaroni to the cheese sauce and stir until the pasta is evenly coated and heated through. If desired, transfer to a baking dish for an added texture.
If you like a crunchy topping, preheat your oven to 350°F (175°C). Transfer the mac and cheese to a greased baking dish, sprinkle breadcrumbs on top, and bake for 15-20 minutes until golden and bubbly.
Remove from the oven and let it cool slightly. Garnish with fresh parsley before serving.