The 6ft 3ins Turkey international impressed during a loan spell from Celta Vigo between February and June in 2021 - and has penned a deal with Albion after being released this summer.
Yokuslu's capture sealed an impressive summer transfer window for Steve Bruce, who has also added former Reading playmaker John Swift and ex Millwall winger Jed Wallace to a squad featuring the likes of Grady Diangana and Karlan Grant.
USA striker Daryl Dike is back to full fitness so should provide the Baggies with some firepower in the attacking third, something they were lacking last season after he suffered an injury.
And 28-year-old Yokuslu is confident Bruce's team can challenge Norwich and Watford for the automatic promotion spots, telling the Express & Star: "I accept that challenge to be promoted, this is the only place I can accept that challenge - I want to fight with the guys for this club.
"I'm really motivated and hopefully we can get promoted. I can give my word that I will give my best, and we will give our best, so hopefully we can be happy.
"It will be tough, especially the first weeks, months, but we will need to work hard as a family. We are ready, I am ready.
"That's why I came here. When I was here before I was feeling really good, I love the club, the people at the club. It feels like home.
"I have a really special relationship with the fans, they are really amazing, the Baggies are the best for me.
"We have a good relationship and they always support the team.
"They are fantastic so I am really looking forward to playing in front of them to make them happy.
"I'm really excited and motivated. I've taken care of my body and my fitness, I really feel good.
"I'm looking forward to playing with my teammates. I really missed them.
"When I saw them I just wanted to hug them. They are kind, good people and I hope we can be happy at the end of the season all together.
"Hopefully we can celebrate with the whole club, the Baggies fans, and all the players."