Ultimate Alfredo | Mama's Cooking

Ingredients

• 8 ounces rigatoni
• 2 tablespoons unsalted butter
• 1/4 cup all-purpose flour
• 1 1/2 cups milk
• 1/2 cup buttermilk
• 3/4 teaspoon kosher salt
• 1/2 teaspoon black pepper
• 1 1/2 cups parmesan cheese, finely shredded, divided
• 4 cups rotisserie chicken, shredded and warmed
• 1 (5-ounce) package fresh baby spinach, wilted and warmed
• dried herbs, of your choice, to taste, for garnish