In a small saucepan over low heat, melt the butter until fully liquified.
Stir in the roasted garlic, garlic powder, onion powder, and black pepper until well combined.
Remove the saucepan from heat and let it cool slightly.
Gradually stir in the freshly grated Parmesan cheese until it is fully combined.
For a smoother consistency, use an immersion blender to blend that sauce until it is creamy.
Stir in optional herbs like parsley or Italian seasoning, if desired. Serve warm or chilled.
Notes
Parmesan Cheese: Use freshly grated parmesan for this recipe. Pre-shredded cheeses contain additives that will produce a grainy-textured sauce.
Roasted Garlic: Roasted garlic gives this sauce a deep, bold flavor. It is best to roast the garlic ahead of time to let the flavors fully develop before using it in the sauce.
Butter: Salted or unsalted can be used. If you're using unsalted butter, you may need to add some additional salt.
This garlic parm sauce is super versatile. Add red chili flakes, cayenne pepper, or white pepper to make it spicy. Add up to ¼ cup of heavy cream to make it creamier, or add additional fresh herbs to match the flavor of the dish you are cooking.
Don't overheat the butter. The butter only needs to be melted, it doesn't need to be hot. Overheating the butter can cause it to burn or your cheese to clump.
Blend the sauce with an immersion blender for a smoother consistency, if preferred.
Store leftovers in a sealed container in the fridge for up to 4 days. Reheat over low heat or use the microwave in short bursts. Give it a quick stir if it has separated.