How to Make Spaghetti without Cooking Cream Recipe Ingredients: 1 Kilo boiled spaghetti (pasta) 4 Tablespoons butter 3 Tablespoons cornstarch or white flour 3 Cups of full fat liquid milk Salt and black pepper to taste 1 Cup mushroom 1 Onion, chopped 2 Tablespoons dried thyme Method: In a saucepan over medium heat, melt the butter, then add the onions