Yes, that is brown sugar. And no, we're not really sure how much she ate before we realized what she had discovered. I do know that in the thirty seconds it took to get a picture of her in the act, she took at least three handfuls of the stuff. And she was in the kitchen for several minutes alone when I thought she was just playing with the mixing bowls. I'm trying not to think about it.
Although, I can't say I really blame her. I myself used to eat straight powdered sugar. But at least I had the decency to hide in the garage while doing so.
I am still giggling at the whole situation. Way to take matters into your own hands, Ella.