If you find that there is too much moisture in the cauliflower mashed potatoes and it is sloppy, you could do one of two things: 1. The mash could be thickened with 1-2 tablespoons of instant mashed potatoes or just enough to stop it from being to runny. 2. Use heat to evaporate the excess moisture. Place the mashed potatoes in a larger saucepan and heat uncovered over a medium/low flame. Constantly stir to avoid burning and cook until it reduces and becomes thicker.