If you are starting with just 1 cup of flour, you don't need to add too much of anything other, b/c it's gonna be too wet.
1 cup of flour
1 tablespoon of oil
1 tablespoon of mashed potato
1 tablespoon of apple sauce
(water is going to be ify here, just do that last as you might only need a tiny tiny bit or none at all)
Again, you'll have to play around with the ingredients and measurements.
I have mead so many 'blah and burnt treats' but ya know what, mine still eat them and want more - go figure