How Is Shake Shack's Black And White Shake Different From Its Vanilla And Chocolate Version? - Tasting Table
Briefly

Shake Shack is well known for its variety of milkshakes, including their unique seasonal options. Among the regular offerings are the 'vanilla and chocolate shake' and the 'black and white shake,' which feature chocolate and vanilla flavors but have different compositions. The former combines both custards, while the latter is vanilla custard with chocolate fudge noted for a richer chocolate flavor. Homemade versions mimicking these milkshakes can be made, emphasizing Shake Shack's distinct use of custard ice cream instead of standard ice cream.
Shake Shack offers two similar milkshakes: the 'vanilla and chocolate shake' has both custards mixed, whereas the 'black and white shake' features vanilla custard with fudge.
To differentiate between the vanilla and chocolate shake and the black and white shake, one can observe that the former is slightly darker in color.
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