The 17-year-old completed the full 90 minutes of last night's 4-1 win over Nottingham Forest in the FA Youth Cup, a result that sees the Potters progress to the last 16 of the competition.
The central defender featured in three games for the first team whilst with the Tangerines, but had to endure a long spell on the sidelines after his transfer to the bet365 Stadium.
"I'm just delighted that I could finally play," Souttar said after the match.
"It was frustrating but there's no point in getting down about it, that time's over now and I can play.
"I've just got to hit the ground running and it was a good to start with a win.
The Potters face either Brighton & Hove Albion or Cambridge United in the Fifth Round - with the two teams meeting for their tie on Friday evening - and Souttar is relishing the opportunity to play again in the competition regardless it may be against.
"I've moved here and I've always wanted to play in the FA Youth Cup," he added.
"I played in the Scottish youth cup and we got to the semi-finals last year, but I've always wanted to play in the English youth cup.
"We just need to take just one game at a time, and if we play our best we can beat anyone on our day."