Gluten-Free Rainbow Cookies

Italian rainbow cookies, also commonly known as tri-color cookies, first became a thing in Italian immigrants in New York. They were made to show patriotism and represent the Italian flag. Since then, they have become widely popular as Christmas cookies.

Believe it or not, these cookies are actually not cookies at all! They're dense layers of almond sponge cake, jam, and chocolate cut into perfect tiny squares. The flavor combination is delicious, and the light texture of the cake just can't be beaten.

Serving these for the holidays? Tri-color cookies make an excellent complement to our gluten-free cut-out sugar cookies on a Christmas cookie tray.

There are plenty of reasons this gluten-free rainbow cookie recipe just works! 

🧾Ingredient Notes

• Almond Paste - Almond paste is not the same as almond extract, Almond paste is made up of blanched almond flour, sugar and egg whites, and occasionally vanilla extract. Adding additional almond extract will cause the cake to taste fake.
• Unsalted Butter - You can also use salted butter if that's all you have, but you should avoid adding any extra salt. 
• Sugar - Give the cake just the right amount of sweetness.
• Kosher Salt - Only add if you use unsalted butter. Otherwise cut the amount in
• Eggs - You'll need four large eggs, separated. 
• Flour - Use your favorite 1:1 gluten-free flour blend, just be sure it contains xanthan gum. If not, you will need to ¼ teaspoon.
• Cornstarch - Cornstarch helps create a lighter texture in gluten-free cakes. If you don't have any, you can swap it out for an equal amount of additional flour.
• Food Coloring - You'll need both red food coloring and green food coloring to color the cake. I recommend gel food coloring.
• Jam - Classic rainbow cookies are layered with raspberry jam and apricot preserves. Be sure that whatever you choose is free of seeds or kernels.
• Dark Semisweet Chocolate Chips - You can substitute ganache if you prefer but it is more work and not significantly different in taste in this recipe.

⏲️How to Make GF Rainbow Cookies

Start by preheating the oven to 350ºF. This recipe is not made on cookie sheets but in small jelly roll pans, also called quarter sheet pans. Line the bottom of each pan with a sheet of parchment paper and grease the bottom and sides of all three pans.  

Next up: the cake! This recipe is so easy and makes a ton! Don't forget to plan ahead and leave time for the cookies to chill after assembling.

Make the Batter

In a large bowl, break the almond paste up with a fork or use your hands. Add in the butter, sugar, and egg yolks. Beat until the mixture becomes light and fluffy.

In a separate bowl, stir together the dry ingredients which are the flour, salt, and cornstarch. Slowly add the flour to the butter mixture.  

In another clean bowl, beat the egg whites until soft peaks form. Fold the whites into the dough, then mix until blended. 

Divide and Bake

Evenly divide the batter into three equal parts, then color one with red food coloring, one with green, and leave one as-is for your white layer. You can add more food coloring for a darker color if desired.

Spread each color into its own pan. Carefully spread out the batter, it might not reach all the edges of the pan. This is fine because you are going to trim the edges

Let the cake batter (i.e. cookie dough) rest for 10 minutes before placing it on the center rack of a preheated oven. Bake until the edges are light golden brown. Cool for 5 minutes, then turn over onto wire racks to cool completely.

Assemble the Cookies

Lay a piece of parchment paper onto a baking sheet. A larger half-sheet pan works best for the assembly.

First, lay down the green layer and spread that evenly with raspberry filling. Add on the white layer, then top that with apricot jam. Use a pastry brush to push the jams to all four corners of the cookie. Finish with the red layer.

Cover the cake with plastic wrap, then add a cutting board on top. Place something heavy on top of the cutting board, like a skillet or a few canned goods.

Chill the cookies in the refrigerator for a minimum of 4 hours.

Frost and Cut

Remove the cookies from the fridge, the cake layers should have adhered together but still defined and visible. Melt chocolate in a microwave-safe bowl and stir every 30 seconds. Pour the melted chocolate over the chilled cookies.

The cookies need to be refrigerated a second time for at least 30 minutes to set the chocolate topping. Use an offset spatula to spread out the chocolate, creating a swirled pattern across the top.

Use a sharp knife to trim the edges and cut the cookie into ½ to 1-inch strips. Cut each strip into 4-5 pieces, then enjoy or store.

This recipe yields approximately two dozen cookies, but you can get up to three dozen if cut smaller.