Everton struck a deal for Danjuma in the January transfer window but the sacking of Frank Lampard and the uncertainty around their managerial position allowed Tottenham Hotspurs to steal a march on the Toffees to sign the Dutchman on loan.
Danjuma made nine Premier League appearances for Spurs and scored one goal before returning to Spain.
The 26-year-old has also previously played in England for Bournemouth.
He is Everton's second summer signing after Ashley Young joined on a free transfer.
“It’s amazing to join Everton and I’m really happy to be here,” he told evertontv. “It’s been a long time coming to join such a massive club as Everton and it makes me proud.
“I had interest from other clubs but there was a pull towards Everton because of the fans, the manager and the history of the Club and it’s second time lucky for me.
“I know I did not move to the Club in January, that was because there was some uncertainty over the manager situation at that time, but I think it makes it even more beautiful for me to join now. I am very grateful to be at the Club and I can’t wait to play in front of the fans as well.
“I hope to bring a lot of goals and a lot of assists. The manager has clearly improved the team and there is a process ahead with him in charge that I am very excited to be a part of.
“I am very eager to perform and very determined to contribute to the entire club. There’s no vein in my body that doubts my quality, and I’m very determined to now show that for the Evertonians.”
Danjuma has two goals in six appearances for the Netherlands national team but was not included in the squad for the 2022 FIFA World Cup in Qatar.
