Over the last 20 years, there have been two seemingly disconnected developments in optical spectroscopy: frequency combs and multidimensional coherent spectroscopy. Frequency combs revolutionized optical frequency metrology and enabled optical atomic clocks while multidimensional coherent spectroscopy became a powerful tool for studying dynamics on ultrafast time scales in atomic, molecular and solid-state systems. Inspired by a method known as "dual comb spectroscopy", we have recently combined these two developments by demonstrating comb-based multidimensional coherent spectroscopy, which leverages the best aspects of both.