I'm glad it turned out for you. Quite frankly, I'm surprised. Soy powder has a tendancy to make things like that "gluey". When it comes to soy powder though, Genisoy seems to 'blend" the best.

Since you're the "mathematical" type, try weighing your ingredients next time to see if you come up with a difference. I use a digital scale. My protein powder and milk weigh in differently than basic kitchen measurements.