Sundowns beat Amakhosi 3-1 to claim honours at Moses Mabhida Stadium in Durban on Wednesday night.
Mbalula, who was in attendance, said: "Congratulations to Mamelodi Sundowns, tough luck for Kaizer Chiefs.
"I think Sundowns showed a great display you know and the thirst to win, and congratulations to them and all the sports-loving fans.
"It was a festive mood and fantastic environment here today. What sport and football gives to ordinary people, this is what it is, thousands of people coming out for the Telkom Cup."
Mbalula was impressed with the individual performance of Keagan Dolly, who recently helped the national U-23 team qualify for the Olympic Games with their third place finish at the CAF U-23 AFCON in Senegal.
"He was on fire, he was fireworks. He is a great talent, a revelation.
"It was a great day for sport, a real razzmatazz humdinger Telkom Knockout Final," added Mbalula.