Butcher, the Olympic champion who is from Alexandra, ended his long wait for a World Cup title as he stormed to victory in the final.
He headed home ahead of Martin Rudorfer of the Czech Republic and Manuel Ochoa of Spain.
"I had a bit of a slow start to the World Cup in kayak cross. I talked to my coach yesterday of just letting it go and putting any expectations away. Just sending it," the 30-year-old from Alexandra said.
Since making his international debut in 2012, Butcher has picked up three silvers and one bronze, but a World Cup gold had eluded him until today.
"I really wanted to approach the kayak cross with no expectations. Sometimes I can get too caught up in the tactics, like what I should be doing or what I need to be doing and then I take too long to make a decision.
"Prague is my favourite World Cup race, I love coming here and I love racing here," Butcher said afterwards.
"It's epic to take away a win and it's my first World Cup win as well."
The Canoe Slalom World Championships are in Slovenia at the end of August.
