Melt the butter over medium heat in a medium-sized skillet.
1 tablespoon unsalted butter
Add in the garlic and sauté until just soft. Then whisk in the flour.
3 garlic cloves, 1/2 tablespoon all-purpose flour
Turn the heat to medium-low and very slowly (starting with just a tablespoon or 2 at a time), whisk in the whole milk and then the heavy cream. The more you add, the more quickly you can add it.
3/4 cup whole milk, 1/4 cup heavy cream
Bring to a simmer and stir in 1/4 cup freshly grated parmesan cheese. Continue stirring until it melts. Season with salt and pepper to taste (I used about 3/4 kosher salt and 1/8 freshly ground black pepper).
1/4 cup parmesan cheese
To use on a pizza, pour over rolled out pizza crust, top with 2 cups mozzarella cheese and 1/4 cup parmesan and bake at 400 degrees Fahrenheit for 20 minutes. For best results, use a preheated pizza stone.