These delicious gluten free St. Patrick’s Day cookies are made for celebrating! The gluten-free cut-out sugar cookie dough is easy to make, and there is a dairy-free option! I also share all of my tips and tricks to decorate these gluten free shamrock cookies with royal icing!

A stack of decorated gluten free shamrock cookies for St. Patrick's Day.

These gluten free shamrock-shaped sugar cookies are made with my popular gluten free cut-out sugar cookie dough. They are cut out into shamrocks and rainbows because these are well-known symbols for St. Patrick’s Day.

The cookies are then baked and decorated with vibrantly colored royal icing. If you haven’t used royal icing, it is a type of icing made from powdered sugar, egg whites, and colorings. The royal icing is piped onto the cookies in various colors and designs and allowed to dry, creating a smooth, hard finish.

You end up with an incredibly festive and delicious treat to serve for St. Patrick’s Day. We love decorating holiday cookies with royal icing, so be sure to also check out these Gluten Free Halloween Cut-Out Cookies and these Gluten Free Valentine’s Day Cookies, too!

  1. This easy gluten free sugar cookie dough is made for using your favorite cookie cutters.
  2. They are so easy to make.
  3. I include lots of step-by-step directions for decorating.
  4. Cookies are way better than green beer!

If you love cookies, I have TONS OF gluten free cookie recipes for you to try!

A plate filled with shamrock and rainbow cloud cookes.

Ingredient Notes:

For the full list of ingredients and amounts, please go to the recipe card below.

  • Gluten Free Flour Blend – I recommend using King Arthur Measure for Measure or Bob’s Red Mill 1:1. Note you may need to add additional flour if you use Bob’s.
  • Xanthan Gum – If the blend you have doesn’t contain a binder like xanthan gum, you will need to add 1 teaspoon.
  • Baking Powder – Use aluminum-free!
  • Butter – I recommend unsalted butter
  • Vanilla – Use pure vanilla extract.
  • Eggs – Size large.
  • Powdered Sugar – Most brands are gluten free, but you can also check my powdered sugar list.
  • Cream of Tartar – This is needed for the royal icing.
  • Food Coloring – You can use gel or liquid food coloring. Note that natural food colorings will not be as vibrant in color as other food coloring.

Tips For Success:

  • Take special care to measure correctly. If you add in too much gluten free flour or other ingredients, it can mess with the cookies as they bake. If they don’t have the proper ratios of ingredients, you may end up with a mess.
  • Chill the dough when possible. I know you are probably ready to eat your cookies right now, but taking a few minutes to chill the batter makes them less likely to spread.
  • Your oven temperature may be off. Periodically, check your oven temperature to make sure it’s right. Otherwise, the cookies will, for sure, spread if it’s not accurate.
  • Use a cooled cookie sheet when baking. Don’t take a hot cookie sheet and put the batter on it, or I promise the cookies won’t turn out. They start baking immediately, and it messes with them. Use a couple of sheets and rotate them out when making large batches of cookies.
  • Always let your royal icing dry before adding a new layer or color!

If you need more guidance, I also share a ton of gluten free baking tips that help you bake even better.

Step-By-Step Photos and Directions:

Photos of steps 1 and 2.

Step 1: Add the sugar, flour, baking powder, and salt to a large mixing bowl. Use a wire whisk to blend them together.

Step 2: Add the softened butter, egg, and vanilla to a medium-sized bowl. Use the whisk to mix the.

You can use a stand mixer with a paddle attachment if you prefer.

Photos of steps 3 and 4 making the cookies.

Step 3: Pour the wet ingredients into the dry ingredients. Be sure to use a bowl scraper on the sides of the bowl to get all of the wet ingredients out of the bowl.

Step 4: Wrap the cookie dough in plastic wrap and refrigerate the dough for 30-45 minutes. This is to keep the dough from spreading when you bake it, AND it helps soften the rice flour in the gluten free flour blend so there is no grittiness.

A photo of the cookie dough rolled out on a silicone mat with cookie cutters on the dough.

Step 5: Preheat your oven to 350º F. Make sure the oven rack is in the middle position in your oven.

Remove the dough from the refrigerator. Place it onto a silicone mat or a clean surface. Use a rolling pin to roll the dough to ¼ to ½ inch thickness.

Step 6: Take your cookie cutters and cut out your shapes. Place the cookie shapes onto a parchment paper-lined cookie sheet.

Step 7: Bake the cookies for 10-11 minutes, depending on the size and thickness of your cookies. Move them to a cooling rack. Do not ice your cookies until they are fully cooled.

Photo of the royal icing being mixed by an electric mixer.

Step 8: Let’s make the royal icing. It is really easy to make, but it is definitely easier to make with a stand mixer and a whisk attachment. (Your arms can get tired if you use an electric mixer.)

Step 9: Add the royal icing ingredients to a large bowl (if you are using an electric hand mixer) or to the bowl of a stand mixer with a whisk attachment. Whip up your homemade royal icing by starting on low speed.

Mix for 9-10 minutes. The icing should not be runny when you are done mixing!

Mixing green royal icing in a bowl.

Step 10: Add a little royal icing to several bowls. Use your food color to turn the royal icing into the colors you want.

Painting some of the shamrock cookies with green royal icing.

Step 11: When decorating cookies with royal icing, think in layers. I first used white icing and piped it around the edges of the cookies and rainbow sections. Let the white icing dry before adding the next color!

Decorating the different sections of the rainbow shaped cookies.

If you plan to make sections of the same color as these rainbows, add royal icing to one section, then let that section dry. This will leave indentations or lines between the sections. You can see more examples of how to decorate in this way in my Gluten Free Halloween Cut-Out Cookies post.

Step 12: Let the cookies sit until the icing has hardened. Depending on how thick you painted the royal icing on the cookies, this will take several hours.

Frequently Asked Questions:

How do you store gluten free shamrock cookies?

Store these cookies in an airtight container. They will keep fresh for up to 3 days. Otherwise, freeze them in a freezer bag. Be sure the royal icing has hardened before you put them into a container.

How do you decorate a shamrock cookie?

There are several ways to decorate shamrock cookies. Use royal icing, as I did, or frost the tops of the cookies and add your favorite sprinkles.

If you enjoy the cinnamon flavor, you can use this Gluten Free Cinnamon Sugar Cookie recipe as the base for decorating. You can also use shortbread as a base, like in these Gluten Free Maple Shortbread Cookies.

Easter is around the corner, so be sure to check out these Gluten Free Easter Cookies, too.

More Gluten Free Cookies Recipes:

Love This Recipe?

If you made and enjoyed this recipe, I would be incredibly grateful if you could leave a comment below. Please include which flour blend you used. This will help others know this recipe is delicious. Thank you!

A stack of decorated gluten free shamrock cookies for St. Patrick's Day.

Easy Gluten Free Shamrock Cookies

Sandi Gaertner
Easy gluten free sugar cookies for St. Patricks Day. They are decorated with royal icing and there are lots of easy to follow directions!
5 from 9 votes
gluten free allergy icon
nut free allergen icon
soy free allergy icon
vegetarian icon
Prep Time 15 minutes
Cook Time 10 minutes
Dough Chilling and decorating 1 hour 20 minutes
Total Time 1 hour 45 minutes
Course Gluten Free Cookies and Bar Recipes, Gluten Free Dessert Recipes
Cuisine American
Servings 24 cookies
Calories 158 kcal

Ingredients
  

  • 2 cups gluten free flour blend * see note
  • ½ cup sugar
  • 1 teaspoon baking powder aluminum-free
  • dash salt
  • cup unsalted butter
  • 1 large egg
  • 1 ½ teaspoons pure vanilla extract

Royal Icing

  • 3 cups powdered sugar
  • 2 egg whites
  • ½ teaspoon cream of tartar
  • food coloring

Instructions
 

  • In a large bowl, combine the flour, sugar, baking powder, and salt. Use a whisk to mix them.
  • Add the egg, vanilla, and softened butter to a medium bowl and whisk to blend.
  • Pour the wet ingredients into the dry ingredients and mix into cookie dough.
  • Wrap the cookie dough in plastic wrap and chill in the fridge for 45 minutes. This helps the dough to not spread while baking, and it helps soften the rice flour in your blend so the cookies don't have a gritty texture.
  • Preheat the oven to 350º F.
  • Remove the cookie dough from the refrigerator, and place it onto a silicone mat. Roll the dough to 1/4 thickness.
  • Use your cookie cutters to cut out the cookie shapes. Place them onto a parchment paper-lined baking sheet.
  • Bake the cookies for 10-11 minutes. The time may vary depending on the thickness and size of the cookies.
  • Remove the cookies and then them cool completely on a cooling rack. Your cookies need to be 100% cooled before you decorate them.

Royal Icing

  • Add the powdered sugar, egg whites, and cream of tartar to a stand mixer. Use the whisk attachment. Whip on low speed as the powdered sugar gets mixed in. You can use an electric mixer.
  • Mix the icing for 9 minutes. This is what will thicken this mixture into royal icing.

Decorating

  • Move some of the royal icing into small bowls and use food coloring to color each batch. I made a few shades of green icing.
  • If you plan to make sections of the same color as in the rainbow cookies pictured in the post, add royal icing to one section, then let that section dry. This will leave indentations or lines between the sections. You can see more examples of how to decorate in this way in my Gluten Free Halloween Cut-Out Cookies post
  • Allow the cookies to fully dry. The royal icing will harden to lock in the pattern. This will take 4-5 hours, longer if it is humid.

Notes

  1. I tested this recipe with King Arthur Measure for Measure and Bob’s 1:1. Every gluten free flour blend is different, and they all need different levels of moist ingredients. If your dough looks we and is sticky, you are using a starchier blend and you need more flour added. (Note Bob’s flour needed a little more flour.)
  2. If your blend doesn’t have xanthan gum, add one teaspoon.
  3. If you use natural food coloring, your colors will be more muted and not as vibrant.
  4. Store in an airtight container for up to 3 days, or freeze them in a freezer bag. Note the icing should be hardened before storing them.

SPECIAL NOTE

Please know that every gluten free flour blend has a different starch to grain ratio. If you use a blend I didn’t test, you may need to adjust your moisture levels in your baked goods.

Nutrition

Serving: 1cookieCalories: 158kcalCarbohydrates: 27gProtein: 2gFat: 6gSaturated Fat: 3gPolyunsaturated Fat: 0.3gMonounsaturated Fat: 1gTrans Fat: 0.2gCholesterol: 20mgSodium: 8mgPotassium: 36mgFiber: 1gSugar: 19gVitamin A: 167IUCalcium: 17mgIron: 0.4mg
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Nutrition Disclaimer

Nutritional information is an estimate provided to you as a courtesy. You should calculate the actual nutritional information with the products and brands you are using with your preferred nutritional calculator.

5 from 9 votes (4 ratings without comment)

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12 Comments

  1. What if I use an egg replacer such as applesauce, will these flours work and should I put the dough in fridge for an hour prior to making them?

  2. 5 stars
    I made a test batch to see if this cookie recipe would work for a homeschool St. Patrick’s Day treat – and they’re really, really good!

  3. 5 stars
    These cookies are perfect for st Patrick’s day. I can’t wait to make them for a friend who is gluten intolerant. I’m sure she will love it. Thank you.

  4. 5 stars
    These are so cute and tasty! You don’t notice at all that they’re gluten free. Can’t wait to make these wonderful cookies again for family soon!