Pour the chilled rosé wine into the blender.
Add the frozen mixed berries to the blender, distributing them evenly over the liquid.
Squeeze fresh lemon or lime juice into the mixture for a bright citrus note.
Secure the lid on the blender and pulse a few times to start breaking down the berries.
Blend on high until the mixture is thick, slushy, and well combined—about 30-45 seconds.
Check the texture—if it's too thick, add a splash more rosé and blend briefly to loosen.
Pour the slushie into chilled glasses, allowing the vibrant colors and icy texture to shine.
Garnish with extra berries or a citrus wedge for a colorful finishing touch.
Serve immediately with a straw or spoon for a cooling, juicy treat.