Koopa Shell Cookies

Koopa Shell Cookies
Slightly crunchy, delightfully buttery cookies dipped in bright royal icing.


Koopas first appeared in Super Mario Bros. and have been showing up in Mario games ever since. I went with green shells as they’re the most popular Koopa color. Plus, red shells make Mario Kart players, well, see red. I’ve heard many a race foiled as the player was sent spinning by the deadly red shell, mere inches from the finish line. So, green shells it is.
These cookies take awhile to put together due to the drying time of the icing. They’re worth it!
Ingredients for cookies:

1 cup butter, softened
1 cup powdered sugar, divided
2 cups all-purpose flour
1/4 teaspoon salt
1 teaspoon vanilla extract
3/4 cup finely chopped pecans (walnuts work as well)

Ingredients for Royal Icing:

2 egg whites
1 1/2 cup powdered sugar
Green food coloring
White decorators’ gel or white frosting
Black decorators’ gel

Preheat oven to 350°F.
Blend the softened butter and vanilla extract until it looks like mayo.

Koopa Shell Cookies

Koopa Shell Cookies

Koopa Shell Cookies

Add in the flour, 1/2 cup of powdered sugar, and salt. This is a thick dough, so it will take a few minutes for the dough to become well mixed.

Koopa Shell Cookies

Koopa Shell Cookies

Mix in the chopped pecans or other chopped nut of your choice.

Koopa Shell Cookies

Koopa Shell Cookies

Form into one inch balls and place on cookie sheet. These cookies don’t spread, so you can pack a lot of them on a cookie sheet.

Koopa Shell Cookies

Bake for 10-12 minutes. The cookies are overdone if the tops are brown, so check out them often. They’re done when they are firm and the bottoms are golden brown.

Koopa Shell Cookies

Just pulled from the oven.

Pour the remaining 1/2 cup of powdered sugar into a bowl. While the cookies are still warm, roll them in the powdered sugar. I rolled the cookies right after pulling them from the oven; it was like playing the game Hot Potato. If the cookies are allowed to cool for a minute or two, you won’t have to bobble the hot cookie around.

Koopa Shell Cookies

Koopa Shell Cookies

Once the cookies have been rolled in powdered sugar, allow to cool. While they cookies are cooling off, you can put together the royal icing.
Mix together the powdered sugar and egg whites. You’ll want a pretty thick frosting, otherwise it will run right off the cookie.

Koopa Shell Cookies

Koopa Shell Cookies

Add the green food coloring. It took quite a bit to get this bright green color. I used coloring gel; it took four good squeezes of the bottle.

Royal icing hardens quickly so you’ll have to be quick with this dipping part!
Grab a cookie and dip halfway into the frosting. Shake off any access frosting, then place on a sheet of tin foil to dry. Drying time takes about an hour.

Koopa Shell Cookies

Koopa Shell Cookies

Once dried, use black decorators’ gel to create the turtle shell pattern on the top of the cookie. Use white gel or frosting around the edge of the green frosting to complete the cookie. I found that using the smaller gel container was less awkward to use than the bigger frosting can.

Koopa Shell Cookies

Koopa Shell Cookies

Makes two dozen Koopa Shell cookies.

Koopa Shell Cookies

5 thoughts on “Koopa Shell Cookies

  1. Fantastic recipe! I made this for my gaming buddies and they *loved* it. I put a finger indention on both sides of the shell to have the “shell inside,” which turned out great.

  2. I love all these recipes! I am going to make these cookies this weekend for me and my friends! I’m gonna try the blue shells since we looove knocking people out of first place with them 🙂
    This site rocks!

  3. Me & meh bro made your cookies at like 10 pm & we had to go to walmart T.T But dammit We did it & we made the cookies & they rocked like utter bliss! Kudos!

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