<p>This research experimentally investigates the laminar flame speed and Markstein length of mixtures of n-dodecane (D.D.) and methyl decanoate (M.D.) at varying elevated pressures (2, 4, and 6 atm) and a temperature of 473 K, relative to the equivalence ratio. Using the schlieren technique, outward propagating spherical flames were developed within a constant volume combustion chamber. The results indicate that the laminar flame speed peaks for all mixtures at an equivalence ratio around 1.1. The flame speeds of the D.D. and M.D. mixtures fall between those of pure n-dodecane and pure methyl decanoate. Increasing the proportion of methyl decanoate in the mixture results in decreased flame speeds. Additionally, the measured Markstein length is highest at low pressure and decreases with increased pressure and equivalence ratio, demonstrating a tendency consistent with hydrocarbon behavior.</p>