Funfetti Cake Mix Cookies

I'm so sorry, there aren't pictures with this one. I was trying to get everything ready for company and totally spaced to take pictures. But this turned out great and it is so much fun, especially for kids...and yumm-o!! I got this recipe from www.cakespy.com and love it! Enjoy!
Funfetti Cake Mix Cookies
Cookies:
1/4 c. butter, softened
1 pkg. cream cheese
1 egg
1/4 tsp. vanilla
1 pkg. funfetti or rainbow chip cake mix
Filling:
Frosting
Preheat oven to 350 degrees. Cream butter and cream cheese. Blend in egg and vanilla. Add cake mix in two parts, mixing well (it will be super thick-if it is too stiff, add a small quantity of heavy cream). Using a small cookie scoop, drop balls of cookie dough on an ungreased baking sheet. Leave about 2 inches between cookies. Bake for 8-10 minutes, or until lightly browned. Cool cookies for at least 15 minutes on the cookie sheet before transferring to a wire cooling rack; the cookies are very delicate when they first come out of the oven and they will break if you try to transfer them too soon. Once completely cool, add a generous dollop of frosting to the bottom of half the cookies, and then sandwich the rest of the cookies on top to form something that vaguely resembles a whoopie pie, but tastes like something else entirely.