Dummett, who celebrated his 22nd birthday on Thursday, and 21-year-old midfielder Ameobi combined to set up Papiss Cisse for the 31st-minute opener.
Ameobi doubled the dose by feeding Yoan Gouffran for the 67th-minute strike which secured the 2-0 victory and left Pardew delighted.
Pardew said: "I don't really need to talk it up, I think it spoke for itself. The real highlight was obviously Dummett and Sammy.
"We have had Paul since he was nine, we have had Sammy since he was 14.
"I bumped into a lady today when I was popping out for my lunch and she said, 'You are looking after my nine-year-old at the moment'. I said, 'Well, there is a route to the first team'. There's nothing better than having local players on the pitch and we are really pushing those two to see if they can crack a regular first team spot.
"They were terrific tonight and I am pleased for them both."