In a large skillet over medium heat, melt the butter.
Once the butter is fully melted, stir in the garlic and cook until fragrant, about 1 minute.
Pour in the heavy whipping cream and stir to combine. Bring the mixture to a gentle simmer.
Reduce the heat to low. Add the parmesan cheese, salt, and pepper. Stir continuously until the cheese is fully melted and the sauce is smooth and slightly thickened, about 3 to 4 minutes.
Add the cooked orzo to the skillet and stir until fully coated in the sauce. Let it warm through for another 1 to 2 minutes, stirring occasionally.
Serve the creamy orzo warm, garnished with chopped fresh parsley.