Melt butter in a saucepan over medium heat
Add minced garlic and cook for 30 seconds
Pour in heavy cream
Simmer gently for 3 to 5 minutes
Reduce heat to low
Whisk in grated Parmesan cheese until smooth
Add salt to taste
Add black pepper to taste
Stir until sauce thickens
Remove from heat
Toss with cooked pasta immediately