Melt butter in stovetop over low heat.
Once butter has melted, add cream cheese until it softens.
Then add heavy cream.
Add garlic powder, as well as salt and pepper to taste.
Simmer for 15-20 minutes, stirring constantly over low heat.
Remove from heat & stir in Parmesan cheese ~ will thicken a small bit while standing.
Serve on hot fettucine noodles.