Milk I would agree with - I wouldn't think grapes or any other fast sugar would be beneficial as it would likely raise sugar quicker. I still vote for a different I:C, increasing the amount of bolus up front without any additional carbs and leaving basal alone. If that results in her going a little low later you can give her a little something. Then next time you can add the milk or something with a little fat, or then maybe a temp basal. I would not add any more carbs to the mix until the numbers are lower. IMHO you want to see the effect of the cereal, not cereal plus other stuff.