This paper is associated with a poster winner of a 2022 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. ; Marangoni-driven flows arise from spatial variations of surface tension along a free surface, which usually occurs where temperature or concentration gradients are present [1,2]. The unbal anced stress tangent along the free surface also promotes motions inside the bulk liquid. This occurs when stirring together different miscible liquids or by uneven heating of liquid in a container. These situations occur frequently during processing in the chemical, beverage, and food industries [3]. Other Marangoni-induced phenomena are common in daily life, such as coffee rings [4,5], tears of wine [6–8], and inkjet printing [9], can cause enhanced splashing [10] and flow patterns in soap bubbles [11]. These motions often produce intricate patterns on the free surface. One striking example emerges following the impact of a drop on a miscible pool of a different liquid [12,13]. In the immiscible case a drop of oil will spread on water to form a molecular-thin film. This can also lead to “Marangoni bursting,” when the drop is highly volatile and the edge of the spreading film fragments and releases a regular stream of minute droplets [14]. On the other hand, when a miscible drop with lower surface tension is deposited on a pool surface with stronger surface tension, its edge is pulled outwards to spread and mix with the underlying pool. This motion will continue until the surface-tension difference is neutralized. This spreading can generate a characteristic vortex ring under the edge of the spreading disk [15–17]. For the inverted problem, with the drop liquid having the stronger surface tension, a Marangoni-driven vortex ring appears inside the drop [12]. On the time scale of a minute, this motion forms a flowerlike pattern [13]. Herein, we use high-speed video imaging to discover a related Marangoni-driven instability in the same ...