Using a Premier Melanger
How to load, run, and read your grinder. What conching time actually does to flavor and texture, and when to stop.
Start with warm nibs and run for at least 24 hours. Taste at 24hr, 48hr, and 72hr. Longer means smoother texture and rounder flavor, but returns diminish fast after 72 hours for most origins. Bright, fruity origins like Madagascar often taste better at 24–36 hours than at 72.
Shop melangers →The standard home-scale melanger. Granite drum and roller do both particle reduction and conching in one machine.
Weigh nibs, sugar, and cocoa butter accurately. Chocolate recipes are ratios; consistent percentages mean consistent results.
Particle reduction happens in the first 8–12 hours: the granite rollers grind cacao solids from coarse grit to a smooth paste, targeting a particle size below 25 microns (imperceptible to the tongue). Conching, everything after that, does something different: volatile acetic acid and other off-notes evaporate, the flavor rounds out, and the cocoa butter distributes more evenly. More conching generally means less raw bitterness and a rounder mouthfeel. But it also reduces brightness. Fruit-forward origins have a sweet spot well before their theoretical maximum.
Run the empty Premier for 5 minutes before adding anything. The granite drum and bowl need to be warm or your nibs will seize and clump instead of liquefying. Cold granite is the most common cause of a stuck start. If your kitchen is cold (under 65°F), give it 10 minutes.
Add winnowed nibs in 200–300g increments, not all at once. Wait for each addition to become liquid before adding more. The machine's motor isn't strong enough to handle the full load dry; adding gradually lets the fat release gradually. For a 1 lb batch, you're looking at 3–4 additions over 15–20 minutes. The first addition is the hardest, it takes the longest to liquefy.
Once all your nibs are in, leave it alone. The grinder is doing the heavy mechanical work: reducing particle size from several hundred microns down toward 25 microns. The mass will look rough and grainy. Resist the urge to open it repeatedly; heat loss slows the process. The mass will become noticeably more liquid around the 90-minute mark.
Add granulated sugar in small amounts, tablespoon by tablespoon, once the mass is fully liquid and warm to the touch (around 110–120°F). Adding sugar too early, before the mass is fully liquid, causes it to seize into a thick paste that's difficult to recover from. Adding it too fast has the same effect. The machine will slow visibly as each addition is incorporated; wait for it to recover before adding more. Powdered sugar works too and incorporates slightly faster.
If your recipe calls for added cocoa butter, add it now, melted, alongside or just after the sugar. Additional butter thins the mass and helps particle distribution. It also affects your final mouthfeel and snap, so use it intentionally, not just to make the machine run quieter. A few percent added butter is common in home recipes; 5% is a reasonable starting point if the mass feels stiff.
Take a small sample on a spoon and let it melt on your tongue. The texture will be slightly gritty, you're feeling particles still above 25 microns. What you're tasting is the flavor baseline: how the origin expresses before extended conching smooths it out. Note the acidity, any sharp or harsh edges, and whether the fruit notes are vivid. This is also when you catch fermentation defects (acetic sharpness, flat off-notes) that won't improve with more time.
Noticeably smoother. The acidity has begun to soften; harsh edges are rounding out. For most origins, this is a meaningful flavor change from 24 hours. For bright, fruity origins, particularly Madagascar or Papua New Guinea, consider finishing here. The fruit notes are more present at 48hr than at 72hr for these origins. The tradeoff is a slightly less smooth mouthfeel.
For most origins, 72 hours is the practical endpoint. The texture is smooth, the flavor is rounded, and the acidity has been brought into balance. Extended conching past this point yields diminishing improvements and starts to reduce flavor complexity. If at 72hr the chocolate still tastes sharp or harsh, check your beans, that's a fermentation issue, not a conching issue. More time won't fix under-fermented cacao.
Soy lecithin is an emulsifier that dramatically reduces chocolate viscosity at very small doses (0.3–0.5% by weight). It lets the mass flow and temper more easily. The tradeoff: it slightly dampens fine flavors. For a single-origin bar where the origin character is the point, use it conservatively or skip it. For couverture or molded products, a small amount makes working with the chocolate significantly easier.
If your chocolate is still harsh or astringent at 72 hours, the problem is almost certainly in the beans, under-fermented cacao brings tannins and raw bitterness that no amount of conching will remove. Check your source. If the chocolate is gritty at 72 hours, it's still above 25 microns, run another 12–24 hours. If the machine is running very hot (over 140°F), reduce batch size; overloading causes friction-induced heat that can scorch the mass.
Log your grind start time, conche duration, and tasting notes at each checkpoint. The difference between 24hr and 72hr is dramatic the first time you do it, write it down so you can replicate the sweet spot.
Log a Batch →