Pour cold brew into an ice-filled glass. Stir in macadamia nut syrup.

Top drink with macadamia cream cold foam and sprinkle on sugar cookie crumbles.

Put water, sugar, and chopped macadamia nuts in a medium saucepan and bring to a boil. Lower heat and simmer for about 10 minutes, until sugar is dissolved and mixture thickens. Remove from heat and let steep. Strain mixture.

Mix milk, cream, vanilla syrup, macadamia syrup, and white mocha sauce until well combined. Chill until ready to use.

To create cold foam, froth the chilled mixture using an electric frother, hand mixer, or blender.

Combine sweetened condensed milk and 2% milk over medium-low heat until simmering. Pour over chopped white chocolate and stir until smooth. Cool and store in refrigerator.