The new and distinct Crape Myrtle plant named Lagerstroemia ‘;Peppermint Mocha’; has a dense, broadly-spreading, mounded habit, that is ground hardy to at least USDA zone 6, has glossy, dark-green foliage that have a medium wine-colored blush when young. The rosy-pink flowers on dense reddish stems cover the shrub. The new plant resists leaf spot and powdery mildew and is useful in the landscape as a specimen, en masse, or as a container plant.