The Seasiders opened the scoring after just three minutes. A tidy bit of play in the final third put the Cobblers under pressure, with the ball eventually finding its way to Zac Ashworth at the back post to finish past Ross Fitzsimons.
Ian Evatt’s side doubled their advantage from the penalty spot at the beginning of the second half.
After being brought down in the box, Ashley Fletcher stepped up to convert the penalty himself - and was able to send the goalkeeper the wrong way.
Joe Wormleighton had one of the better chances to register a goal for the visitors ahead of the hour mark, but was unable to keep his shot down in the box, while George Honeyman had a shot blocked down the other end, as Blackpool looked to extend their lead further.
There was also a golden opportunity for Kamarl Grant to mark his home debut with a goal, with the Millwall loanee smashing an attempt against the inside of the post.
Here’s how the Seasiders performed:
7. Jordan Brown - 8
It was a solid effort from Jordan Brown in the centre of the park. Photo: Gareth Evans
8. George Honeyman - 8
George Honeyman certainly got stuck in, and saw two shots blocked in the build-up to Ashworth's opener. Photo: Gareth Evans
9. Joel Randall - 7
Joel Randall showed snippets of what he is capable in a promising debut in Tangerine. Photo: Gareth Evans
10. Zac Ashworth - 8
The ball fell nicely to Zac Ashworth for the opener, with the wing-back smashing the ball past several bodies. Photo: Gareth Evans
11. Ashley Fletcher - 7
Ashley Fletcher was brought down in the box at the beginning of the second half, and converted the penalty himself for his 18th goal of the season. Photo: Gareth Evans
12. Michael Obafemi - 6
Michael Obafemi was kept quiet on the whole, but did make some decent runs forward, and was on hand with the pass that led to the penalty being given away. Photo: Gareth Evans