Fresh lemon balm is one of the most versatile herbs you can grow or buy, with a gentle citrus-mint flavor that works in everything from salads to tea to desserts. The leaves are the star: tender, fragrant, and best used raw or lightly steeped to preserve their delicate flavor. Here’s how to get the most out of them.
Picking and Storing Fresh Leaves
If you’re harvesting from your own plant, timing matters. Research on essential oil content shows that harvesting just before or during flowering gives you the most aromatic leaves. Morning (around 6 a.m.) and evening (around 7 p.m.) harvests also yield more essential oils than midday picking, so plan accordingly if you want the strongest flavor.
Once picked, keep the leaves on the stem until you’re ready to use them. They stay fresher that way. Store stems in an airtight, waterproof container in the fridge and use them within five days. After that, the aroma fades quickly. If you have more than you can use, hang whole stems to dry in a cool, low-light spot with good airflow.
Making Lemon Balm Tea
Tea is the simplest and most popular way to use fresh lemon balm. Take about 20 fresh leaves, place them in a teapot or large mug, and pour one quart of boiling water over them. Let it steep for 5 to 10 minutes. The longer you steep, the stronger the flavor. You can drink it hot or chill it for iced tea.
The taste is mild and slightly sweet, somewhere between lemon and mint but softer than either. It’s naturally caffeine-free, which makes it a good evening drink. A clinical trial found that a combination of lemon balm and valerian improved sleep quality by 33% compared to 9% with a placebo, so there’s real science behind using it as a calming bedtime ritual. Fresh leaves also contain compounds with antioxidant and anti-inflammatory properties that may help ease mild anxiety, though the effects are gentler than you’d get from a concentrated supplement.
Cooking With Lemon Balm
Think of lemon balm as a milder, more citrusy cousin of mint. You can swap it into almost any recipe that calls for fresh mint, and it also works well as a substitute for lemon verbena (just use a bit more, since lemon balm is less intense).
The key rule: add it at the end. Heat destroys the delicate oils that give lemon balm its flavor, so toss it in after cooking or use it raw. Here are the most practical ways to work it into meals:
- Salads: Tear whole leaves into green salads, or cut them into thin ribbons (chiffonade) and scatter over fruit salad. It pairs especially well with grilled peaches and creamy burrata.
- Protein dishes: Add sliced leaves to chicken salad or scatter them over fish right before serving. It pairs beautifully with poultry in particular.
- Desserts: Infuse heavy cream with a handful of leaves for about 30 minutes, then strain and use the cream to make panna cotta or crème brûlée. You can also candy whole leaves by coating them in egg white and sugar, then letting them dry into a crystallized garnish for tarts and ice cream.
Drinks and Infusions
Lemon balm shines in cold drinks. Drop a few whole leaves into a pitcher of water and let it sit in the fridge for an hour or two for a subtle infused water. For something with more punch, muddle the leaves into the syrup base of a lemonade or limeade before adding your citrus juice. The muddling releases the essential oils and gives the drink a more complex, herbal flavor.
For cocktails or sweetened drinks, make a lemon balm simple syrup by steeping several sprigs in equal parts sugar and water while the syrup cools. Strain out the stems and store it in the fridge. This syrup works in everything from gin and tonics to sparkling water to drizzling over pancakes.
Topical Uses
Lemon balm has a long history of topical use, particularly for cold sores. The antiviral properties come from the same compounds responsible for its calming effects. Standardized lemon balm cream (typically a 1% extract) applied at the first tingling sensation and reapplied every 2 to 4 hours during an active outbreak is the standard approach. Fresh leaves alone won’t deliver the same concentration as a prepared cream, but crushing a few leaves and holding them against the skin is a traditional remedy some people find soothing.
Who Should Be Careful
Lemon balm is safe for most people in the amounts you’d use in cooking or tea. The one notable exception involves thyroid conditions. Components in lemon balm interfere with how thyroid-stimulating hormone (TSH) binds to receptors in the thyroid gland, which can affect the production of thyroid hormones. People with hypothyroidism, Graves’ disease, or anyone taking thyroid replacement medication should avoid lemon balm, because its effects on the thyroid are unpredictable and not well studied. While no formal drug interactions have been confirmed, the theoretical risk is enough that most references flag it as a precaution worth taking seriously.