Using a hand mixer or blender, mix together the milk, cream cheese, flour, and salt until smooth, then set aside.
In a saucepan, melt butter and add minced garlic. Sauté garlic for about a minute, then add peeled and deveined shrimp.
Cook shrimp for 3-5 minutes, until pink and just cooked through.
Remove shrimp from the pan, leaving garlic butter drippings in the saucepan.
Add the milk mixture to the pan, stirring constantly over medium heat for 4 minutes. Bring to a simmer, continue stirring for about 6 more minutes until sauce thickens.
Remove from heat, stir in grated Mozzarella and Parmesan cheese.
Cover and let sauce stand for about 5 minutes to thicken.
Add cooked shrimp into the sauce and let stand another 5 minutes.
Serve sauce and shrimp over noodles of choice, such as fettuccine (1 lb package recommended).
Garnish with dried parsley before serving.
Notes
This creamy shrimp Alfredo recipe is perfect for a quick weeknight meal with rich flavor and easy preparation.