Hi Kelly,
Minnie is a bit more elusive when it comes to character dining. In addition to Chef Mickey's, she is sometimes at
Cape May Cafe at the Beach Club Resort for breakfast. Just an fyi that she may not always be there.
She may also be found at Mickey's Sorcerer Hat at Disney's Hollywood Studios, at the Character Connection at Epcot, and Camp Minnie-Mickey at the Animal Kingdom. I realize it isn't the same as character dining, but I hope at least a good back-up plan for your daughter to meet Minnie. If you are planning on attending
Mickey's Not so Scary Halloween Party, she may also be there in costume!
When you arrive at the parks, you'll want to grab a copy of the
Times Guide with the maps; it will list all the characters and the times they'll be out and about.
Have a wonderful trip; please let us know if we can help again.