I had some frozen cookie dough in the freezer from when I made a huge batch ahead of Christmas using my All Purpose Christmas Cookie dough recipe. My daughter, Sarah, and I got creative and turned it into some fun marble heart cookies for Valentine's Day.
We had less red dough than the neutral color. We rolled the neutral color dough out between two pieces of plastic wrap and then tore it into pieces. We then rolled the red dough into "snakes" and placed them between the pieces of neutral colored dough.
At this point, we replaced the top piece of plastic wrap and rolled it flat again to about 1/4" thick.
We cut hearts out using a cookie cutter.
We collected the scraps of dough and rolled them again. This time we got a great marble effect.
The third time we rolled the dough, the marbling was almost too much leaving them more pink. My favorite hearts came from the 2nd rolling. You can see them on the right in the photo below.
Bake at 375 degrees for 8-11 minutes our until just barely turning brown on the edges. Mine only took about 8 minutes. Cool on a wire rack. No frosting needed. These freeze very well after being baked so don't hesitate to plan ahead next year and get them done a week or two early for the parties at home or school.