Place the halved strawberries into the blender, ready to be blended into a smooth base.
Add the fresh lemon juice to the strawberries in the blender. The bright citrus will enhance the fruit's natural sweetness.
Toss in the ice cubes, which will give the slushie its signature icy texture once blended.
Blend everything on high speed until the mixture is thick, frosty, and the ice is fully crushed, about 30-40 seconds.
Stop the blender and check the texture; if it’s too thick, add a splash of water or more lemon juice, then blend again briefly.
Pour the slushie into glasses, allowing the icy, vibrant red mixture to flow out in a thick, slushy stream.
Serve immediately, garnished with a fresh strawberry or twist of lemon if desired, to enjoy its bright, refreshing flavor.