Cook the tortellini according to package instructions. Drain and set aside.
In a large skillet over medium heat, melt butter and sauté garlic for 1–2 minutes until fragrant.
Add heavy cream and bring to a gentle simmer. Cook for 3–4 minutes.
Stir in Parmesan cheese and mix until smooth and creamy.
Season with salt and black pepper to taste.
Add cooked tortellini to the sauce and stir to coat evenly.
Serve immediately, garnished with chopped parsley if desired.