Went to Vleminckx based on the good reviews… It is in the shopping district and there’s always time for a snack! Prices are good - medium size cone is 2.75€. It is a stand - no places to sit. Interestingly, the café across Vleminckx offers you to sit at their place if you buy a drink!
They were very good! If there’s no line up, go for it - otherwise, there are many places in Amsterdam for fries!