Hey there, Johnny, and welcome to planDisney!
I definitely understand that plans can sometimes change, so I'm happy to report that there should be a few different ways to cancel your order of a Celebration Cake with your
Storyteller Café reservation.
The first place I'd recommend checking is the
My Plans page on Disneyland.com or the Future Plans page on the
Disneyland mobile app (found in the Menu). As long as your dining reservation is linked to your Disneyland account, you should see the reservation here and hopefully be able to cancel the cake add-on.
If you're not able to cancel it yourself, you could
call a Cast Member at the Guest Information line or speak to a Cast Member at Storyteller's Café once you arrive at the Disneyland Resort.
I'm not sure which meal of the day you'll be visiting for, but if it happens to be for
Breakfast or Brunch then I would highly recommend the Chilaquiles and Eggs Benedict! I'm a huge fan of Storyteller's Café, and these are two of my favorite selections when we visit.
Thanks again for your question, Johnny! I hope you enjoy your meal and your visit to the Disneyland Resort!
Have a Magical Day,
Greg