Take a pan and add butter to it.

Add minced garlic to the melted butter.

After adding minced garlic, add all-purpose flour.

When the ingredients are mixed, pour half and half milk into the pan.

Now, add grated parmesan cheese to the pan.

Once the cheese melts, sprinkle parsley.

Let the sauce cook for a few minutes.

Lastly, blend the mixture in the blender to make it smooth.

Your garlic sauce is ready to serve.