The South African entered the FNB Stadium encounter as a half-time substitute, with the scores level at 1-1 after Leonardo Castro canceled out Thembinkosi Lorch's opener for Pirates.
Memela needed less than 30 seconds to make his impact on South African football's biggest stage, firing home with his second touch of the game, his first having been used to control a pass into the area to tee up the shot.
Memela would go on to complete his brace after squeezing home at Itumeleng Khune's near post after a ball across the area from Justin Shonga following a quick counter-attack.
"They were putting pressure on us because we weren't creating any chances. I think in the first-half, we only had one chance, the one that Lorch scored," the striker told SuperSport TV after the game.
"At half-time, the coach told us we need to push high, try and create more goals and we were lucky that, early in the second half, we got the first chance and we used it."
The match also marked Memela's first involvement in a league derby, making his brace that much more memorable, but the forward preferred to focus on the team's overall display.
"I've been waiting for this for a while, it was my first derby. I'm happy that I managed to score a goal, but I'm happy for the team," he concluded.