# Step-by-Step:
01 - In a blender, combine the ice cubes, cold water, lemon juice, sugar, and blue raspberry syrup.
02 - Blend on high speed until the mixture is smooth and slushie-like in consistency.
03 - Taste and adjust sweetness or tartness by adding more sugar or lemon juice, if desired.
04 - For a festive touch, moisten the rims of serving glasses and dip them into blue sanding sugar.
05 - Pour the slushie into prepared glasses.
06 - Garnish with lemon slices, raspberries, and mint leaves, if desired. Serve immediately.