Anyone remember the old "Chocolate Milk Better than 'Surge' for Post-Workout Recovery" that Aragon did in the 90's/Early 2K? LOL.
Total daily protein intake matters 1000% more than the little bit you take after a workout, so she can just eat her next meal if she wants. Resistance training (as opposed to running a 26 mile marathon) makes only a very small dent in the bodies' Glycogen stores, and they will replenish over the next 24hrs anyway - so carbs aren't critical either.
But, if you/she just can't divest from having something sugary/protein/"fast" after a workout - A bowl of Captain Crunch w/Milk of choice, and a scoop of Cinnamon / Vanilla etc... Whey fits the bill nicely. You get your carbs from the cereal and Lactose, Casein from the Milk, and Whey from your powder.
Another Option would be a cup of Oikos Triple Zero Yogurt, Whey mixed in, a Bananna and or Blueberries (<---great for recovery) with maybe an added 1/2 cup of Grape Nuts.
Both of those will fill her up WAAAAAAAY more than 8oz of liquid and some powder - just fit them in the daily macros.