Kevin Lisbie got the hosts up and running with a first-half brace, before Dean Cox, Shaun Batt and Jayden Stockley completed the rout.
Danny Haynes notched the Magpies' only reply on a dismal night for the bottom side in Sky Bet League One.
"I couldn't be happier," said Slade. "The goals were raining in, everybody was chipping in. Notts County came here with a certain game plan and we had to adjust to that and as soon as we came to terms with that, we got on top.
"When we get in that final third, we are deadly at the minute. If it's not Kevin Lisbie that's scoring, then it's David Mooney and I'm also delighted for the others that have come on and scored.
"It's good news for us that others are getting in on the act of scoring goals. I've asked our players to be ruthless in both boxes and that's what I got."
"We never like to concede a goal but there haven't been too many this season," Slade continued. "You always want to keep a clean sheet and the lads at the back will have been wanting to do that
"But we can all improve and there's room for everyone to do that. We've now won seven games and we've got to embrace that and enjoy it. But as I say, we've got to try and improve and better ourselves and that's the target.
"You can't question the players' will to win, that's the phenomenal part about us."