RAINBOW COOKIES ROCK!!!!!! For my Dad's bday 2025.... For a fun twist I combined 2 of our favorite treats....rainbow cookies and crumb cake. I made this fabulous homemade crumb cake recipe and pushed some sliced rainbow cookies into the batter. I used cookies I had stored in the freezer and stood them up in the batter. Use an offset spatula to help spread the batter over the cookie tops and then proceed with the recipe as written. You may want this COOL Knife----click here RAINBOW COOKIES ROC...