The trio were snapped filming scenes for the family reality show Keeping Up With The Kardashians in Studio City on Monday (10 March).
How jealous are we of that sunshine?!
Khloe and Scott's friendship has been growing from strength to strength lately, which is pretty amazing if you can remember the animosity that used to exist way a few years ago when Khloe wasn't sure Scott was really the one for Kourtney.
How times have changed!
Speaking of Kourtney, she was absent from yesterday's lunch venture, as was her and Scott's one-year-old daughter Penelope, but family patriarch Bruce Jenner joined them, standing out from the crowd in a bright red shirt.
Khloe, meanwhile, looked fantastic in simple faded jeans and a black top.
Her outing with Scott, Mason and Bruce came just two days after she shot down the latest round of rumours about her love life.
Khloe was linked to Rick Ross at the weekend after she was pictured with him at an event, although Khloe was quick to hit back, tweeting: "Please stop linking me to any man I take a picture with.... Its getting old."
She divorced husband Lamar Odom in December following four years of marriage.
Elsewhere, it was recently rumoured that Scott had proposed to his girlfriend of nearly eight years, Kourtney, and a US tabloid claimed the pair were planning to elope to Mexico.
However, neither Scott nor Kourtney has commented on the story.
In April last year Scott hinted that the couple are perfectly happy to remain unwed, saying: "I think if it's not broke, don't fix it. You know what I mean? I feel like I used to want to get married more than she did. And then being that she was always so not interested, I've decided not to be."
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