In response to a tweet highlighting the cartoon, WikiHow replied: "Disgraceful. Working on preventing this from ever happening again."
The website later apologised for the cartoon, created by a team of illustrators in 2014, explaining: "The colourist wasn't aware it was Obama and Beyoncé."
Wikihow tweeted: "When we saw the whitewashed image of Obama, Jay Z & Beyoncé, we were disgusted & ashamed. It never should have been on wikiHow.
"Within minutes of the 1st tweet, a volunteer removed the image. We then started investigating how it got on wikiHow at all.
"We learned it was made 3 years ago by a team of illustrators who work as one. One person sketches, the other person colors.