Rainbow Cookies

While all the layers and colors may make you think the rainbow cookies are difficult to make, the recipe itself is relatively straightforward and easy to make! The most difficult part is flipping the cake layers on top of each other. Want another Italian dessert for the holidays? Try my anise cookies recipe, panettone recipe, and cannoli recipe.

What You Need to Make This Recipe

Butter — make sure you buy unsalted butter. The butter also needs to be at room temperature to cream smoothly. Almond paste — almond paste consists of ground almonds or almond meal and sugar and gives the cookies the texture they’re known for. Do not confuse this for marzipan, as it’ll change the texture and flavor of the batter. Eggs — four eggs may seem like a lot, but it helps gives the layers their spongey texture. Make sure to separate the eggs, as beating the egg whites lightens and tenderizes the cookie layers. Almond extract — using almond extract adds a rich, slightly fruity flavor to the cookies. Food coloring — gel food coloring is ideal as you can use less to get the desired color.  Jam — I use raspberry jam to hold the cookie layers together, but you can also use apricot jam or another jam of your choice. Chocolate chips — use good-quality chocolate chips such as Ghirardelli chocolate chips, as they melt down easily and have a super creamy texture.

How to Make Rainbow Cookies

1. In the bowl of a stand mixer fitted with the paddle attachment, beat together ½ cup of butter, the sugar, and almond paste on medium speed until smooth. Add the remaining 1 cup of butter. Beat on medium until light and fluffy. With the mixer on low, add the egg yolks and almond extract, beating until just combined. 
2. Gradually add flour and salt, beating until just combined. Stop occasionally and scrape down the bowl during mixing.
3. In a large mixing bowl, beat the egg whites with an electric mixer with clean beaters or the whisk attachment on high speed until stiff peaks form. Working in batches, gently fold the egg whites into the cookie batter until combined and no streaks of egg white remain.
4. Divide the batter evenly among 3 bowls. Stir the red food coloring into one of the bowls of batter until fully combined. Stir the green food coloring in the other bowl of batter until fully combined. Leave the final bowl uncolored.
5. Spread each batch of batter into 3 different lined 9×13-inch baking pans. Bake for 15 minutes, then rotate the baking pans in the oven before baking for another 12 minutes. Let the cookies cool completely in the pans on wire racks.
6. With the cooled green layer still in the pan, spread ¼ cup of the jam in an even thin layer over the top. 
7. Flip the plain (un-dyed) layer on top of the jammy green layer. Spread the remaining ¼ cup jam in an even, thin layer over the plain layer, then place the red layer on top of the jammy plain layer. Cover with a sheet of plastic wrap. 
8. Place one of the baking pans on top of the stacked layers. Evenly place weights (such as plates or canned vegetables) on top of the pan. Refrigerate for at least 4 hours or up to 12 hours.
9. Once chilled, remove the weights and plastic wrap. Invert onto a cutting board and trim the edges to straighten it. In a microwave-safe bowl, heat the chocolate chips in 30-second intervals stirring between each, until the chocolate is melted. Spread the melted chocolate over the top and sides of the stack. Let cool slightly, about 5 minutes. 
10. Using fork tines, scrape wavy lines into the chocolate. Refrigerate, uncovered, until the chocolate is set, about 30 minutes. Using a serrated knife, slice the slab of rainbow cookies into 2-inch squares. 

Pro Tips for Making This Recipe

Using seedless raspberry jam is preferred. You can also press raspberry jam through a fine mesh sieve to remove seeds.Instead of microwaving the chocolate, you can place chocolate chips in a small heatproof bowl set over a small saucepan of 1-inch simmering water; constantly stir until the chocolate fully melts, about 5 minutes.It is essential to have a clean and dry bowl for whipping the egg whites. The egg whites also cannot contain any egg yolk. You will have difficulty whipping up the whites if the bowl is not completely clean or yolk-free.Eggs are easier to separate when cold, but egg whites whip up easier when closer to room temperature. I recommend separating them in advance.Measure your flour correctly! Adding too much flour to the recipe is the most common mistake. The best and easiest way to measure flour is by using a scale. If you don’t have one, fluff your flour with a spoon, sprinkle it into your measuring cup, and use a knife to level it off.Use a serrated knife to cut the rainbow cookies for the best-looking results. Serrated knives will cut smoothly through things with a hard exterior and softer interior. Run the knife under hot water before slicing, and clean the knife between each slice for a clean presentation of the layers.Do not skip weighing down the layers. Doing so will let the jam absorb into the layers and help them stick together. Weighing the layers down also ensures that the cookies won’t fall apart when sliced.This melted chocolate sets up much better if the rainbow cookie layers aren’t warm. The chocolate will melt off if you do not give enough time for the layers to chill.

If you’ve tried this Rainbow Cookies recipe, then don’t forget to rate the recipe and let me know how you got on in the comments below, I love hearing from you!