[2] The song is a club-oriented R&B[3] and pop[4] track featuring a Jersey club bridge[5] built upon a minimal hip hop beat.
Joshua Minsoo Kim of Pitchfork regarded "Cookie" as the "most interesting selection" from the EP, calling "a weightless groove about courting a crush".
[8] Han Seong-hyun of IZM defined the song as a "small experiment for the next step and commented positively on the "odd" lyrics and the "kitschy" rhythm.
[9] The song has received backlash due to allegations that the lyrics contain sexual innuendos which many considered inappropriate for a group composed of teenagers.
[10] In a review for NME, Carmen Chin noted the "lyrical innuendo that can only be described as concerning when delivered by a group of 14- to 18-year-olds – some examples that listeners have flagged as distasteful are "Looking at my cookie / Do you ever smell it different?
[10] According to ADOR, they consulted "numerous doctors in English literature, interpreters and native speakers" who agreed that "cookie is not widely used sexual slang".