I was reading the comments for kakeladi's Original WASC recipe.  One person wrote:

"Ok so I just got the cake into the freezer. I made an orange version of this recipe. Instead of water I used orange juice and added 1/2 pack of jello. That's the only thing I did differently. It turned out soooo good! It is very moist and delicious.Yes, w/o the oil it is great. I can't wait to use this recipe again."

Read more at http://www.cakecentral.com/recipe/7445/the-original-wasc-cake-recipe#8YvzbAzBi7RoH8U1.99Has anyone ever done this or something similar?  Just dry jello?

Yes, just dry Jello. I use Strawberry Jello in my Strawberry cake, and it really amps up the flavor.

What kind of cake do you start out with?

Start with white, yellow or fr. vanilla.  OR..... if you can find a creamsicle flavored mix - even if it's just a 'cupcake mix'. They are smaller but  OOOOHHHH the wonderful taste!   It would be worth buying just to mix with a regular one, then you wouldn't even need to add the jello:)   I mixed mine w/choco brownie mix and those were the BEST brownies ever!   My local 99 cent store had both flavors.