Bianca Censori knows how to cool off a hot day … grabbing ice cream with her man Kanye West — and wearing her skimpiest clothes out.

The two stars were spotted in Mallorca with Bianca’s sister, Angelina … stopping off for a sweet treat in a crowded marketplace — and Bianca’s back in her summer ensembles, leaving nothing to the imagination.

BC wore a mesh top out with no bra underneath — so, everyone around them got to see everything she’s packing up top.

Kanye’s dressed a bit more conservatively … a gray sweater with “Army” written in black letters across the front and dark sunglasses on his face — though he’s not covering up with a full mask or bandana like we’ve seen him in the past.

It’s a rare sighting for the couple … whose relationship was in trouble back in February. Remember, shortly after the Grammys stunt — where Bianca showed up in a body suit that covered basically none of her body — sources told us both Kanye and Bianca reached out to divorce attorneys.

We were told they have no prenup … which would’ve made for a messy divorce — but, then they were spotted in Mallorca — which has become their Spanish sanctuary — last month grabbing dinner together.