The minnie mouse ears will be made from gumpaste and will go on a 6 inch dome cake. I've been searching how to attach the ears but am finding nothing, I was thinking about using royal icing, are there better options? please help! thank you!

If heat isn't an issue, I would use a bit of melted chocolate wafers as they would set up almost immediately vs. the royal icing which would take much longer to set up.

You might also want to use some spaghetti noodles or something else to support the ears. I always try to use edible things whenever possible. HTH

When I did my minnie mouse cake. I used toothpicks to hold my ears up. It is in my gallery.