1st....BREATHE! there IS an answer 2nd...yes, adding more sugar will make it stickier.use the cornstarch or even use shortening. from what i know pettinice is pretty soft/stretchy like you said. you MAY want to get some Wilton fondant and just mix some of that in to get it workable (50/50)...along with a bit more shortening. GOOD LUCK!
8/2/12 at 9:28pm