How to make lavender syrup: simmer equal parts water and sugar into a simple syrup, take it off the heat, then steep a small measured amount of culinary (food-grade) dried lavender in it for 10 to 20 minutes and strain well. The trick is a light hand — too much lavender turns the syrup soapy and perfumey instead of gently floral. Once it cools, this floral syrup sweetens lavender lattes, London Fogs, and iced coffee.
Homemade wins over the bottle here for one reason: control. You decide how floral it gets, how sweet it is, and exactly what goes in. Below is what the syrup really is, the one caveat that matters most (the lavender you buy), a full ingredient list, the step-by-step method, how to dial in the amount, ways to use it, and how to store it.
What lavender syrup is (and the lavender that matters)
Lavender syrup is a plain simple syrup — equal parts sugar and water cooked just until the sugar dissolves — infused with dried lavender flowers. That infusion is the only real difference between this and a vanilla syrup or a caramel syrup: the same sweet base carries a different flavor. Steeping the buds off the heat pulls their soft, floral, faintly herbal aroma into the syrup without cooking them into bitterness. This is what people mean by a lavender simple syrup, and it is the base for any lavender latte syrup you have tasted at a cafe.
The one thing you cannot get wrong is the lavender itself. Use only culinary, food-grade dried lavender buds — the kind sold specifically for cooking and baking. Do not use potpourri, craft-store lavender, decorative dried bunches, or lavender essential oil. Ornamental lavender is often treated with dyes or sprays that were never meant to be eaten, and essential oil is far too concentrated for food. Culinary lavender (usually the variety Lavandula angustifolia, or "English" lavender) is grown and processed for the kitchen, so it is milder and sweeter than the sharp decorative types. If a jar does not clearly say food-grade or culinary, do not steep it into anything you plan to drink.
Ingredients
This lavender syrup recipe makes roughly a cup of syrup — plenty for many drinks. You need three core ingredients plus a couple of optional extras.
| Component | Amount | Note |
|---|---|---|
| Water | 1 cup (240 ml) | Filtered if your tap water tastes strongly of anything |
| Granulated sugar | 1 cup (about 200 g) | Equal parts sugar and water is the cafe-standard 1:1 simple syrup |
| Culinary dried lavender | 1 Tbsp (or 2 tsp for a first, gentler batch) | Food-grade buds only — never potpourri or essential oil; too much turns it soapy |
| Vanilla (optional) | 1/2 tsp extract | Rounds off the florals; classic alongside black tea in a London Fog |
| Lemon peel (optional) | 1 small strip | Adds a little brightness; lift it out before bottling |
Gear is minimal: a small saucepan, a spoon, a fine strainer or a piece of cheesecloth, a funnel, and a clean glass bottle or jar with a tight lid. That is the entire kit.
How to make lavender syrup step by step
The method mirrors any simple syrup, with the lavender added off the heat so the aroma stays fresh rather than stewing into something bitter.
- Combine sugar and water. Add 1 cup sugar and 1 cup water to the saucepan and set it over medium heat.
- Simmer until clear. Stir now and then until the sugar fully dissolves and the liquid turns clear, usually 3 to 5 minutes. Let it reach a gentle simmer, but do not boil it hard — you want to dissolve the sugar, not reduce it.
- Take it off the heat. Pull the pan off the burner before the lavender goes in. Adding the buds to boiling syrup is the fastest way to draw out harsh, bitter notes.
- Add the lavender. Stir in your measured lavender, plus the optional vanilla or lemon strip. Start with the smaller amount if it is your first batch — you can always steep longer, but you cannot take flavor back out.
- Steep 10 to 20 minutes, tasting as you go. Let it infuse off the heat and taste with a clean spoon after about 10 minutes. When it smells clearly floral but still pleasant — not soapy — it is done. Shorter steeps give a gentle hint; longer steeps get bolder, so stop the moment you like it.
- Strain well. Pour the syrup through a fine strainer or cheesecloth to catch every bud. Leaving lavender in the bottle keeps extracting and will push the flavor into that soapy zone.
- Cool and bottle. Let the syrup come to room temperature, funnel it into a clean bottle or jar, seal, and refrigerate. Label it with the date you made it.
Getting the amount right
Lavender is powerful, and the line between "gently floral" and "tastes like soap" is narrow. That is why a light hand matters more here than with almost any other syrup. Two levers control the strength: how much lavender you add, and how long you steep it. Keep the buds modest and use steep time as your fine-tune.
Start with about 1 tablespoon of culinary lavender per cup of syrup, or 2 teaspoons if you are cautious, then taste at the 10-minute mark. If it is too faint, keep steeping and taste again every few minutes. If you overshoot on a future batch, dial the buds back rather than the time. And remember the syrup tastes stronger on its own than it will once it is diluted into milk or coffee, so aim for a touch more floral than seems right straight off the spoon.
How to use lavender syrup
Dose roughly 1 to 2 tablespoons of lavender syrup per drink and adjust to taste — start low, since you can always add more. Because it is already liquid, it blends into cold drinks without the grit of granulated sugar.
- Lavender latte: stir the syrup into the espresso, then add steamed milk, hot or iced. For the full drink build and milk ratios, follow our latte at home guide and simply swap in this syrup.
- London Fog: the classic pairing is lavender with black tea and steamed milk. A little vanilla in the syrup makes it taste even more like the cafe version.
- Iced coffee: stir a spoonful straight into cold coffee or cold brew; it dissolves instantly and adds a floral lift to an otherwise plain glass.
- Lavender cold foam: add a splash to the milk or cream before you froth it, so the floral note cascades down through an iced drink. Our guide to how to make cold foam covers the frothing technique in full.
Lavender also plays nicely with vanilla, honey, and lemon, so it is easy to layer into lemonades, sodas, and steamers beyond coffee. A calming, aromatic cup is part of its appeal for many people, though responses vary and this is not medical advice — treat it as a flavor you enjoy rather than a remedy.
How to store lavender syrup
Keep the bottle sealed in the refrigerator, where a 1:1 syrup holds up for about two to three weeks. Pour it directly or use a clean spoon each time, never one that has touched another drink, so you do not introduce anything that speeds spoilage.
Give it a look and a sniff before each use. Cloudiness, floating specks, any fuzz, or a sour or fermented smell all mean the batch is past it — when in doubt, throw it out and simmer a fresh cup. If you want a longer-keeping syrup, a higher 2:1 sugar-to-water ratio lasts a little longer, and some people add a small splash of vodka (about a teaspoon per cup) as an optional preservative.
A quick safety note
The whole recipe rests on one rule worth repeating: use only food-grade, culinary dried lavender, never craft or decorative lavender and never essential oil, and go easy on the amount. Beyond that, lavender syrup is just sugar, water, and a floral aroma. As with any botanical, if you are pregnant or breastfeeding or taking medication and have questions about consuming lavender, ask your own healthcare provider — responses vary, and this is a flavor guide, not medical advice.
Once a bottle is cooling on your counter, a lavender latte or an iced coffee with a floral twist is a single pour away. Make it once, keep it in the fridge, and you will reach for it far more than you expect.