You could add heavy cream to egg scrambles with the cheese.
i can't remember if you said this already - i know she wont drink from sippy cups/bottles ATM, but have you tried letting her drink from a plain 'adult' cup?
And this sounds sort of ridiculous, but when Max was sick and we were just trying to keep him hydrated and he wasn't drinking enough out of bottles and sippy cups, my father took a plain old water bottle, emptied it and put the cap back on and then drilled a tiny hole in the top. Then he made a game out of squirting in in his mouth. Not and ideal way to learn to drink from a cup, but if you're looking to get more milk/cream/calories in her, may be another idea.