Buttery Alfredo Sauce

INGREDIENTS

• 1 cup unsalted butter
• 1 1/2 tablespoons minced garlic
• 1 tablespoon all-purpose flour
• 4 cups heavy cream
• 1/4 cup whole milk
• 8 ounces freshly shredded Parmesan cheese
• 2 ounces shredded fontina cheese
• 1/2 teaspoon salt
• 1 teaspoon ground black pepper