Melt butter in a small saucepan over medium heat. Whisk in flour and continue whisking for 1-2 minutes (do not let it brown).
Slowly add milk, whisking constantly until smooth, thickened, and bubbly.
Whisk in 1/4 teaspoon salt, 1/8 teaspoon black pepper, and pressed garlic.
Add parmesan cheese and whisk another 30 seconds. Remove from heat and continue whisking just until cheese is melted and sauce is smooth, then set aside to cool before using for pizza. Do not boil after adding cheese or sauce may curdle. Once cooled, cover and refrigerate up to 5 days.
Enjoy your delicious white pizza sauce on your homemade pizzas! 🍴