Lascelles bagged the victor against Stoke on Saturday, his second winning goal in as many games, after also scoring an nearly identical header to earn all three points against Swansea the week before.
A 3-0 win against West Ham followed by a gritty 1-0 victory away at Swansea steadied the ship after a drab start to the season.
The Spanish manager returned to the touchline after missing last week's match and watched compatriot Joselu spurn a hat-trick of chances against his former club.
Newcastle took a 19th-minute lead after neither side had come near a sniff of goal.
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Joselu was again guilty of failing to make the Potters pay just moments later, the 27-year-old this time unable to beat Butland in a one-on-one when Ayoze Perez's deflected strike fell kindly in the area.
The Toon Army, however, got their noses back in front after Jamaal Lascelles headed in a corner by Ritchie in the 68th minute.
Christian Atsu scored his first-ever Premier League goal in his 10th appearance in the competition, despite making his English top-flight debut in August 2014.
(Owen Humphreys/PA) Atsu may score more spectacular goals, but the one he claimed against Stoke capped a fine team effort.
Newcastle United are reportedly set to announce a new five-year deal for captain Jamaal Lascelles.