Ahhh...she is still a baby
Mine were fully 100% trustable trained until 1.5 y/o
I think a yummy treat reward for good potty (outside) may do the trick.
I have had a lot of success, using Peanut Butter Chips from the baking isle. Do you have a Whole Foods by you? These are the ones I used to get and they sell them at Whole Foods (or online):
Sunspire Natural Chocolates - Products - Peanut Butter Chips (1000 Count)
Best Wishes