What Are Rainbow Cookies? These cookies were invented in Italian-American bakeries in New York City. The colors represent the Italian flag. Today, you’ll find them all over Italian communities around Christmas.
In a mixing bowl, combine the almond paste, butter, sugar, egg yolk, and almond extract until light and fluffy.
In a separate bowl, combine the flour, baking powder, and xanthan gum.
Add the dry ingredients to the wet ingredients, mixing until evenly combined.
In a new bowl, beat the egg whites with an electric mixer until stiff peaks form. Add the egg whites to the batter and gently fold the egg whites in.
Divide the cookie dough into 3 equal portions. Add green food coloring to one and red food coloring to a second. Stir until the color is even and to your desired shade.
Preheat oven & spread the cookie dough evenly onto the baking sheets. Bake for 12-15 minutes, until the edges are golden brown. Remove from the oven and let cool completely on a wire rack.
Remove the cakes from the baking sheets. Place the green cake on a working surface. Cover the cake with the jam all the way to the edges.
Place the plain cake on top and cover with the remaining jam. Then put red cake on ton. Put a cutting board on top of the layered cake. Place several jars full of water on top and place everything in the fridge for at least 2 hours to firm up.
When the cake is done chilling, melt the chocolate in a microwave-safe bowl until smooth. Spread the melted chocolate over the top of the cake.
Let the cake rest until the chocolate is hardened. Trim the edges if necessary, then slice into individual cookies and enjoy.
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