In a medium saucepan, melt the butter over medium heat.
Add minced garlic and sauté until fragrant, about 1 minute.
Pour in the heavy cream, stirring continuously.
Bring the mixture to a gentle simmer, avoiding boiling.
Gradually whisk in the grated Parmesan cheese until melted and smooth.
Season with salt and white pepper to taste.
Continue to stir until the sauce thickens to your desired consistency.
Remove from heat and let it cool slightly.
Toss the sauce with your favorite cooked pasta.
Garnish with fresh parsley before serving.