Here is how to make macadamia syrup in one line: gently toast and lightly crush a handful of macadamia nuts, simmer them in a 1:1 sugar-and-water simple syrup so their buttery flavour infuses into the liquid, then strain and bottle. The result is a mellow, creamy, buttery-sweet syrup you can stir into a latte, iced coffee, cold brew or a jug of steamed milk. It is the natural partner to a macadamia latte, and it comes together in about half an hour.
Below you will find what the syrup actually is, the two technique points that matter most, a full macadamia syrup recipe with amounts, ordered steps, a quick table, and how to store it safely. Because macadamia is a tree nut, read the safety note near the end before you serve it to anyone.
What macadamia syrup is (and how a nut-infused syrup works)
Macadamia syrup is a flavoured simple syrup: a sweet base that has been steeped with toasted macadamia nuts until it carries their rich, round, buttery taste. You are not blending the nuts into the syrup, so it stays pourable rather than creamy-thick. Instead you infuse the flavour and then strain the solids out, exactly the way a cafe makes a hazelnut or almond syrup.
If you want the wider picture of how these bottles fit into a drinks menu, see our overview of coffee syrups. The plain sweet base underneath every flavour is covered in how to make simple syrup, and the closest relative to this recipe is how to make hazelnut syrup — the method here is the same, just with a softer, butterier nut.
The nut does the flavouring; the sugar does the sweetening and helps preserve it. Hot syrup pulls the oils and aromatics out of the toasted macadamias as they steep, and once you strain them away you are left with a smooth macadamia nut syrup that dissolves instantly into hot or cold coffee.
The key technique: toast first, then strain fine
Two small moves separate a flat, milky-tasting syrup from a deep, toasty one.
Toast the nuts first. Raw macadamias taste mild and a little waxy. A few minutes of dry toasting in a pan or a low oven turns them golden and fragrant and coaxes out the buttery, almost caramel note that makes this syrup worth making. Toast until they smell nutty and just start to colour — they scorch quickly because of their high oil content, so keep them moving and pull them the moment they turn golden.
Strain fine. After steeping, pass the syrup through a fine mesh sieve lined with a clean cloth (a coffee filter, a jelly bag or a double layer of cheesecloth all work). Nut oils and tiny fragments are what turn a syrup cloudy and make it spoil faster, so a slow, careful strain keeps the bottle clearer and helps it keep longer. Let it drip; do not squeeze the cloth hard, or you push fine sediment through.
Ingredients and amounts
This makes roughly 300 ml of macadamia coffee syrup — enough for a couple of weeks of drinks. It uses a 1:1 sugar-to-water base, a good handful of nuts, a pinch of salt and an optional splash of vanilla.
| Ingredient | Amount | Role |
|---|---|---|
| Macadamia nuts (raw, unsalted) | 100 g (about 3/4 cup) | The flavour: toasted and steeped to give the syrup its buttery character |
| Granulated sugar | 200 g (1 cup) | Sweetness and body; also helps the syrup keep |
| Water | 240 ml (1 cup) | The other half of the 1:1 base that carries the flavour |
| Salt | 1 small pinch | Rounds out and lifts the nutty sweetness |
| Vanilla extract (optional) | 1/2 tsp | Warmth that flatters the macadamia; add after cooking |
A few notes on the amounts: more nuts or a longer steep give a stronger flavour; fewer give only a whisper. The salt is not there to make the syrup taste salty — a single pinch simply lifts the sweetness and makes the macadamia read as richer. Keep the vanilla optional and add it after cooking so its aroma is not simmered off.
How to make macadamia syrup, step by step
- Toast the macadamias. Warm a dry pan over medium-low heat and toast the nuts for 4-6 minutes, shaking often, until golden and fragrant. Watch closely — they go from pale to too-dark fast.
- Crush them lightly. Tip the warm nuts onto a board and lightly crush or roughly chop them. You want them cracked open to expose more surface area, not ground to a paste.
- Combine the base. Add the crushed nuts, sugar and water to a small saucepan with the pinch of salt. Stir once.
- Bring to a gentle simmer. Warm over medium heat, stirring, until the sugar has fully dissolved and the syrup just begins to simmer. Do not boil it hard.
- Steep off the heat. Take the pan off the heat, cover it, and let the nuts steep for 20-30 minutes. A longer steep gives a stronger, nuttier syrup; taste at 20 minutes and decide.
- Strain out the nuts. Pour the syrup through a fine sieve lined with a cloth into a clean, dry bottle or jar. Let it drip through on its own for the clearest result.
- Add vanilla, cool and bottle. Stir in the optional vanilla, let the syrup cool to room temperature, then seal and refrigerate.
That is the whole macadamia syrup recipe. The longer you steep, the bolder the flavour — and the more thoroughly you strain, the better it keeps.
How to use macadamia syrup
Treat it like any flavour syrup: start with about 10-15 ml (roughly 2-3 teaspoons) per drink and adjust to taste.
- Macadamia latte. Stir a spoonful into the bottom of the cup, pull your espresso over it, then top with steamed milk. For the full milk-and-espresso build, see how to make a latte at home.
- Iced coffee and cold brew. Because the syrup is already liquid, it blends straight into cold drinks with no grainy sugar — ideal over ice or in a tall glass of cold brew.
- Steamed or cold milk. A little in warm milk makes a caffeine-free nutty drink; a little in cold milk makes a quick iced treat.
It also plays well with chocolate, caramel and vanilla notes if you like to layer flavours.
How to store macadamia syrup safely
Keep the syrup in a clean, sealed bottle in the refrigerator and use it within about 1-2 weeks. Because it carries nut oils, it will not last as long as a plain sugar syrup, so make it in small batches. Always pour rather than dip a used spoon into the bottle, which keeps stray milk or coffee out.
Trust your senses. If the syrup smells off, tastes sour, turns cloudy or grows anything on top, throw it out — when in doubt, throw it out. A thorough strain and a spotless bottle are the two things that most extend its life.
Safety: macadamia is a tree nut
This is the important one. Macadamia is a tree nut, so this syrup is not safe for anyone with a nut allergy, and traces of the nut remain in the strained syrup even though the solids are gone. Never serve it to someone who avoids nuts, and label the bottle clearly if others share your kitchen. If you are making drinks for a group and are unsure, leave it off. Responses vary from person to person, and this is general food-safety guidance rather than medical advice — anyone with a diagnosed allergy should follow their own healthcare provider's advice.