Simple - offer to make the cake for him.
My daughter is turning the ripe old age of 6 tomorrow. As usual, my ex and I had a long discussion about how we were going to celebrate her birthday, thanks to it landing on Thursday, the day BEFORE they go to their dad's for the weekend. Because of the bad timing (and high gas prices), we're having separate birthday celebrations - cake and presents at my house on her birthday....and cake and presents when they arrive at his house late Friday night.
In the heat of the moment, I crazily offered to make his cake when I make mine. "I've already bought the gluten-free cake mix and I personally don't want or need all of that cake in the house, especially over the weekend."
So, tonight, after dinner, I cracked open the Betty Crocker Gluten-Free cake mix (chocolate, as requested by the birthday girl) and followed the directions to make 2 - 9" round cakes. They were slathered with frosting straight out of the tub, sprinkled with chocolate and rainbow sprinkles, and decorated with 6 candles
And wha-la....The birthday cakes are done!
Sometimes, I think I'm waaaay too nice to my ex. Actually, I did this for the sake of my daughter's belly, who is much happier on a very-low-gluten diet. ;-)
FYI - This is not an advertisement for Betty Crocker. I bought the cake mix at Target with my own $4 and mixed it with my own two hands. Though I will say this - Thank you, BC, for making this mix! Our non-gluten family can have birthday cake!!! WOOT!