In-N-OutA delicious blend of the Chocolate, Strawberry, & Vanilla MilkshakesChocolate MilkshakeStrawberryVanilla MilkshakeAsk for a "Neapolitan Shake" when you place your order, they will know exactly what you want. Or you can ask for a combination of just two of the flavors if you want to mix things up a little.All Locations4 - Medium$2.10http://hackthemenu.com/in-n-out/secret-menu/neapolitan-milkshake/The In-N-Out Neapolitan Milkshake is a popular item on In-N-Out Burger secret menu for those who just can't decide on which flavor milkshake they want. The simple In-N-Out Burger menu offers only three choices when it comes to their milkshakes: chocolate, strawberry and vanilla. However, by ordering an In-N-Out Neapolitan Milkshake off of the secret menu, you will receive a milk shake that has been blended with all three flavors! Pretty cool, huh? Be sure to check out the In-N-Out Secret Menu as well as visiting our home page to check out the complete list of All the Secret Menus from all your favorite restaurants!