Sweet birch essential oil (Betula lenta) is an aromatic oil obtained from the bark of a plant associated with the Betulaceae family and Eastern North America. It is known for its sweet, minty, medicinal, and wintergreen-like with a strong cooling profile. and is used in perfumery, diffuser blends, and other traditional aromatic preparations.

Sweet birch essential oil has traditionally been used in strong cooling rubs and liniment-style aromatic products. Because it is rich in methyl salicylate, it is a high-caution oil that should be used very sparingly and avoided in many circumstances without professional guidance.

This oil is especially appreciated for its wintergreen-style blending potential and is usually used in small amounts because its scent profile can strongly shape the finished aroma.

Sweet birch essential oil (Betula lenta) is often compared to wintergreen oil due to its high methyl salicylate content.