Hi, Jennifer!
This is a fantastic question and I'm so glad you visited us to ask!
You are correct that there is not currently a Quick Service restaurant at the Yacht Club that serves Mickey waffles. There is the Beach Club Marketplace right next door, just a short walk away at Disney's Beach Club Resort that is a Quick Service location. I don't, however; see Mickey Waffles on their menu. That can change any time, so be sure to stop over and ask a Cast Member while you're there. I do have a couple of other suggestions for you that will require a little more flexibility with pricing and location.
The Yacht Club has
In-Room Dining available and there are Mickey waffles on the menu! Another option would be
Captain's Grille right in the lobby. I know that these options are not Quick Service, but I'm hoping that gives you a couple ideas for enjoying the oh-so-fabulous Mickey waffles at your Resort!
Please come back and see us if we can help with any additional questions you think of!
Wishing you Pixie Dusted vacation planning!
~Jackie