Rainbow Swirl Cookies, also known as pinwheel cookies, are fun to make and even more fun to eat. Take your sugar cookies to a whole new level with these rainbow spiral cookies. These cookies are a beautiful with a crunchy chewy texture. One bite and you are going to have a new favorite cookie.
Preheat oven to 350 degrees. Prepare a baking sheet with parchment paper.
Whisk together dry ingredients: flour, baking powder, and salt. Set aside.
In a mixing bowl, blend the butter and sugar until creamy and light. Add egg and vanilla extract. Mix well. Slowly add dry ingredients and mix until combined. Dough may be a little crumbly.
Turn out the dough onto a surface sprinkled with powdered sugar or flour. Divide into 6 equal parts.
Add food coloring to each portion of dough and return to the mixer until completely blended. Repeat with each color.
Flatten each color of cookie dough into a rectangle shape and layer onto one another, creating a stack of cookie dough. Press together with a rolling pin and flatten to about ¼ to ½ inch thickness.
Starting on the largest side, roll the cookie dough into a tube (like a jelly roll) pressing any cracks to keep the roll tight.
Slice into ¼ to ½ inch slices. Place on a parchment-lined baking sheet.
Bake cookies for 7 to 9 minutes. Do not brown the cookies. Allow cookies to cool for at least 20 minutes on the baking sheet before carefully removing to a cooling rack.
Store in an airtight container between layers of parchment paper to keep the cookies from sticking to each other.