The pizza oven is one of the many cooking stations in Hello Kitty Island Adventure, allowing you to cook up delicious zas for the island inhabitants.Notably, you can use the upgraded pizza oven to cook up the Ultimate Joke Pizza, which is Badtz-marus favorite gift to get. Youll get dough for the oven from Retsuko after gifting her items (which surely you are doing everyday, right?) and you can upgrade the oven by befriending Retsuko further.Below, we explain where to find the pizza oven, how to upgrade the pizza oven, and all the pizza oven recipes available in Hello Kitty Island Adventure.Where to find the pizza ovenThe pizza oven is on Mount Hothead, a bit east of the main fast-travel point. You can trek over to the pizza oven pretty early in the game, just from going all the way around, passing through Spooky Swamp and Gemstone Mountain. Its easier to access if youve unlocked swimming, but you dont need to do that.How to unlock the pizza oven upgradeYoull need to hit Friendship Level 9 with Retsuko in order to use an additional ingredient in the pizza oven. Hitting this requirement quickly can be tough as her liked and loved gifts are pretty hard to get early on. We settled with giving her toasted almonds (found on the ground around Mount Hothead) and ingots (crafted from iron, which is also found around Mount Hothead) during the early-game.You can also expedite this process by using items like Friendship Bouquets and Friendship Blossoms to gift Retsuko more without having to wait until the next day (or time travel).All pizza oven recipesBelow, we list all of the permanent pizza recipes in Hello Kitty Island Adventure.Note that there is a limited-time recipe, the 50th Anniversary Pizza Cookie but its not counted as part of the collections page and you cant make it consistently, as it uses a limited-time material, so we dont have it on our list.There are also multiple recipes for the same pizza, but they are registered individually in your collections. For example, using apple or banana will both give you a Fruit Pizza, but it will register as Fruit Pizza Recipe (Apple) and Fruit Pizza Recipe (Banana) in your collections, so you may want to make all of these to collect all the recipes fully.Ingredient #1Ingredient #2PizzaAny ingredient not listed below.PizzaCoral MilkAlfredo PizzaEggBreakfast PizzaCandy CloudDessert PizzaSugarkelpDessert PizzaSwampmallowDessert PizzaAppleFruit PizzaBananaFruit PizzaStrawberryFruit PizzaStarfruitFruit PizzaPineapplePineapple PizzaMagma BloomSpicy PizzaCinna BloomSpicy PizzaMoon CheeseThree Cheese PizzaToasted AlmondToasty PizzaTofuTofu PizzaSpinipVeggie PizzaPumpkinVeggie PizzaSpinipTofuEverything PizzaMoon CheeseCoral MilkQuattro Formaggi PizzaSpinipCoral MilkSpinip Alfredo PizzaPineappleTofuUltimate Joke Pizza