To prepare a creamy southern shrimp and cheese grits recipe, you'll first need to prepare the shrimp. You can buy frozen shrimp at your local grocery store, or you can cook your own. Peel and slice your shrimp, and add them to the pot. Add the butter, salt and pepper to taste. Heat the oil over medium-high heat, then add the garlic and saute until fragrant, about 1 minute. Stir in the flour and cook, whisking constantly, until the mixture thickens, 2 to 3 minutes. Remove the pan from the heat and stir in 2 tablespoons of the cream of mushroom soup, 1 tablespoon of sour cream and 1 teaspoon of cayenne pepper. Cook the soup for 1 to 2 minutes until it's thick and bubbly. Season with salt, pepper and paprika, if desired. Serve with guacamole.