Does lavender have any bitter notes when used in cooking?

Lavender can have bitter notes when used in cooking, and this is one of the most common reasons why people have an unpleasant experience with it (the "soapy" or "perfumey" taste). However, with proper technique and the right variety, you can largely avoid or minimize these bitter notes.

Here's why lavender can taste bitter and how to prevent it:

Reasons for Bitterness in Lavender:

1. Wrong Species or Cultivar:

   • This is the primary culprit. As discussed, Lavandula angustifolia (English Lavender) varieties are cultivated to have very low levels of camphor and 1,8-cineole, the compounds responsible for medicinal, pungent, and bitter tastes.

   • Other species like Lavandin (Lavandula x intermedia), Spanish Lavender (Lavandula stoechas), and French Lavender (Lavandula dentata) have significantly higher concentrations of these compounds, making them inherently more bitter and less desirable for culinary use. If you use ornamental lavender from your garden that isn't a culinary angustifolia variety, you're very likely to get a bitter result.

2. Over-Extraction or Over-Cooking:

   • High Heat: Exposing lavender to high temperatures for too long, especially boiling it vigorously, can cause the more robust and potentially bitter compounds to leach out or become more concentrated. The delicate floral notes are volatile and can evaporate, leaving behind the less pleasant ones.

   • Long Steeping Times: Even with gentle heat, steeping lavender for an excessive duration (e.g., leaving it in an infusion for hours instead of minutes) can lead to over-extraction of bitter compounds.

3. Using Leaves or Stems:

   • The leaves and stems of lavender contain higher concentrations of the more herbaceous and bitter compounds compared to the delicate flower buds. If you include too much leaf material or fibrous stems in your culinary preparation, it can introduce bitterness.

4. Using Too Much Lavender:

   • Even with the perfect culinary species, excessive amounts will lead to an overwhelming flavor that often translates as "too strong" or "soapy," which is perceived by many as bitter. Lavender is a powerful herb, and a little goes a very long way.

How to Prevent Bitterness:

1. Choose Culinary Grade Lavender:

   • Always use Lavandula angustifolia (English Lavender) specifically labeled as "culinary grade." These varieties are bred for their sweet, delicate floral flavor and low camphor content.

2. Use Only the Buds:

   • Stick to the fresh or dried flower buds (florets). Avoid including large amounts of leaves or stems in your culinary preparations.

3. Gentle Heat and Controlled Steeping:

   • For infusions (syrups, creams, teas), use low to medium heat and avoid vigorous boiling.

   • Limit steeping time. For most infusions, 5-20 minutes is sufficient. Taste as you go and remove the lavender once the desired flavor is achieved. You can always add more lavender for stronger flavor, but don't extend steeping time.

4. Start Small, Taste, and Adjust:

   • Begin with a very small amount of lavender, especially if you're new to cooking with it or trying a new recipe.

   • Taste frequently during the cooking process. It's much easier to add more than to correct an over-lavendered dish.

5. Finely Chop for Direct Inclusion:

   • If incorporating buds directly into baked goods or other dishes, finely chop them to ensure even distribution and minimize the chance of biting into a large, concentrated burst of flavor.