Yoshi Cookie

Yoshi Cookies are the favorite snack of the Yoshis. They are featured as a special item in various Mario titles and also come in a variety of shapes including flowers, hearts, squares, circles, and even Yoshi's face. Some cookies are chocolate, vanilla, and sugar cookies with icing in their centers or carry a checkerboard design.

Yoshi's Cookie
In their debut title Yoshi's Cookie, a puzzle game, Yoshi Cookies enter from either the top or side of the screen as Mario, dressed as a baker, pulls a lever. The plot of the game, in a fashion similar to Tetris or Dr. Mario, is to clear them out as Mario continues to fill the screen with more cookies. This done by pressing the A button and shifting an entire row of cookies. Once a row is, either horizontally or vertically, filled with the same kind of cookie, it is cleared from the screen. The Yoshi-shaped cookie acted like any kind of cookie.

Super Mario-Kun
In volume 8 of Super Mario-Kun (an adaption of Super Mario Bros. 2), Mario briefly becomes a chef and throws Yoshi Cookies.

Super Mario RPG: Legend of the Seven Stars
In Super Mario RPG: Legend of the Seven Stars, Mario and Yoshi are required to bring Yoshi Cookies to Boshi in exchange for a race. Yoshi Cookies can also be used in battle where they summon Yoshi to eat an enemy and defeat it. Sometimes, it awards Mario an item as well. However, some enemies and bosses can not be eaten by Yoshi; if so, Yoshi gives Mario a Yoshi Candy or returns another Yoshi Cookie back. There is a pink Yoshi near the GOAL letters that can store Cookies for Mario, up to a limit of 200. If the number of cookies goes over the 200 maximum, the Yoshi will eat the rest.

New Super Mario Bros. Wii
Yoshi Cookies were originally going to appear in New Super Mario Bros. Wii, but were scrapped for unknown reasons. They had similar effects in the game as a Berry.

Super Mario Galaxy 2
The checkered Yoshi Cookies make a cameo in Super Mario Galaxy 2 in Sweet Mystery Galaxy. They can be revealed from on top of some of the chocolate box platforms when using a Bulb Berry with Yoshi.

Super Mario 3D Land
The checkered Yoshi Cookies appear as platforms in World 3-5 of Super Mario 3D Land.

Paper Mario series
In Paper Mario, if Mario gives Tayce T. a Melon and a Cake Mix, she will make a single Yoshi Cookie. This item restores fifteen HP and fifteen FP. The Yellow Yoshi in Yoshi's Village gives Mario a Melon if he brings him food cooked by Tayce T.. This item can be sold for twenty coins. Another type of Yoshi Cookie named Big Cookie also appears in the game. Yoshi Cookies also bear a strong resemblance to the Zess Cookie and Sweet Cookie Snack from Paper Mario: The Thousand-Year Door and Super Paper Mario, respectively.

Game & Watch Gallery 3
In Game & Watch Gallery 3, the Modern version of Egg replaces the titular eggs with Yoshi Cookies, which bake while rolling down slopes. Light Blue Yoshi can grab them at a certain distance, but if he waits too long, they will fall to the ground and be burned.

Game & Watch Gallery 4
In Game & Watch Gallery 4, the Modern version of Mario's Cement Factory replaces cement-making with cookie-making. The cookies are from Yoshi's Cookie. If Yoshi gets the Yoshi Cookies from the top sent by Mario, he will instead eat the Yoshi Cookies instead of packaging them. If the Yoshi Cookies are sent to Toad at the right side, he will package them. Interestingly, the Yoshi Cookies fit in the packages whole.

Mario Kart: Double Dash!!
In Mario Kart: Double Dash!!, the battle arena Cookie Land is shaped like a cookie and has a variety of Yoshi Cookies in the background. This stage reappears in Mario Kart Wii as a Retro Arena.

Mario Kart 8 / Mario Kart 8 Deluxe
Many Yoshi Cookies appear in the Mario Kart 8 and Mario Kart 8 Deluxe course Sweet Sweet Canyon.

Mario & Luigi: Partners in Time
In Mario & Luigi: Partners in Time in Yoshi's Island of the past, Kamek searches for cookies for Baby Bowser. When Kamek gives them to him, Baby Bowser eats too fast, chokes and drinks some milk. Baby Bowser gets enraged when he finds out that Baby Mario and Baby Luigi ate the cookies while he was talking to Mario and Luigi. Luigi takes four Yoshi Cookies that Kamek dropped and gives one to Baby Luigi immediately. Later, he gives two cookies to Baby Mario and Baby Luigi to calm them down after entering Yoob's Belly. Luigi gave Baby Luigi the last cookie at the very end of the game, in exchange for Baby Luigi's Hammer.

Mario & Luigi: Bowser's Inside Story / Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey
Checkered Yoshi Cookies make a minor appearance in Mario & Luigi: Bowser's Inside Story and its remake. They are one of the various sweets that fall from the sky during the Snack Basket attack. Luigi has to collect these snacks in order to do more damage.

Tetris DS
In Tetris DS, Yoshi Cookies appear in the Puzzle Mode, which is based of the NES version of Yoshi's Cookie. They appear in the glass tube that forms the bottom and left edges, where they are constantly moving. They also appear on the Touch Screen of the same mode, forming a certain pattern in the background, and also in the foreground, where Yoshi is seen eating a heap of Yoshi cookies in the middle.

Other appearances
Although technically not a true appearance of Yoshi Cookies, the designs for the Tasty and Gourmet Gourmet Cookies in Animal Crossing: Pocket Camp featured one and two cookies, respectively that featured a similar design to the checkerboard-type cookies and the flower-shaped cookies, barring being purely circular instead of square-shaped or flower-shaped, respectively.

Trivia

 * A treasure in Pikmin 2 is similar to this cookie, under the name Comfort Cookie.