Ratio of methanol to average hydrogen column density versus Band 7 continuum flux integrated within the methanol snow line (left panel) and versus mass enclosed within r_snow (right panel). For the HL Tau disk, we show the 3σ upper limit on the $N_{{\text{CH}}_3\text{OH}}$, assuming an excitation temperature of 168 K. The low methanol abundance upper limit in the HL Tau disk is likely due to differences in dust optical depth and stellar luminosity compared with other disks in our sample.