Kroupi first headed home from close range after a corner was flicked on, before he smashed home on the half volley following a poor Palace clearance from a rapid Bournemouth counterattack from Antoine Semenyo.
Read more:
That came after Kroupi netted a dramatic late equaliser to rescue a point off the bench at Leeds last month.
The young striker was starting after Evanilson was ruled out with a soleus issue, and while Iraola praised him for his performance, he said they have been working hard to develop his game beyond his goal scoring.
(Image: Keith Gillard)
“I am pleased for him because it's not easy to replace someone as important as Evanilson,” Iraola told the Daily Echo.
“He's a 19-year-old, first start. I think he's someone who has a good relationship with the goal. These two goals where he reads well, the second ball, the rebounds and he should be happy.
“I think we are trying to add him more things because the goal is something that he's always had in different divisions, obviously not in the Premier League, but he’s someone that scores goals.
“But we need him to do a lot of things that Eva is doing for us during the games.”
Iraola said the need to further develop his game is only natural at the age he is – but he has started to settle well.
“We are demanding a big jump from him because he comes from France, second division, he has scored a lot of goals there,” he said.
(Image: Keith Gillard)
“But the jump to the Premier League is big for someone so young. I think he's understanding a little bit the challenge, the rhythm of the Premier League.
“And he's a goal scorer because he smells the chances. He's someone who is very aware of the second balls, where the balls can finish.
“He's a good finisher. But obviously he has still a lot of things to improve the physicality, the rhythm, a lot of things that he has to learn, like normal, because he's 19.
“But I'm very, very pleased that first, even without a lot of minutes the other day, he also scored and recovered a point, Leads away. And today, first start, score two goals is great help for us.”