For thicker-skinned blueberries, a Canadian study recommended a 140-degree treatment for 30 seconds. I tested it twice, with samples of around 150 berries each time. That heat took the bloom off. It melted the natural wax that gives the berries their whitish cast, and left them midnight blue. It also cut the number of moldy berries from around 20 per sample to 2.So this is like inviting berries to the James Brown's Celebrity Hot Tub Party.
"Should I get in the hot tub?
Yeah!
Will it make me wet?
Yeah!"
