RECIPE NOTES - do not add salt until the sauce is finished.. you may not need any salt.Also, if you are serving the Alfredo over pasta, reserve some of the starchy pasta cooking water.
In a skillet add the butter and melt. Then add the garlic and warm over low heat for 2 minutes.
5 tablespoon Salted Butter, 2 Plump garlic cloves
Pour in the cream. Bring to a slight simmer over medium-low heat, whisking often, for about 2 minutes.
1 ½ cup Heavy Cream
Whisk in half the parmesan cheese until fully incorporated. (if adding cooked pasta, do that now)
¾ cup Parmesan Cheese
Then add the remaining parmesan cheese and whisk vigorously until everything is melted, incorporated and thickened.
Remove from the heat. It will thicken even more when cooling.