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The First Bar: bean-to-bar at Home

Chocolate guide 🍫 · Cellar crew · Nov 2026

On this page: the fat math · two formulas, worked · the melanger run · temper to snap

The fat math, in one table

The formulator's ingredient library carries each ingredient's fat share (all editable in the app): nibs/liquor ≈ 55% (the range 50–58% is shown, from the roasting studies), cocoa butter 100%, whole milk powder 26% (the US standard's minimum), nonfat dry milk 1.5%, sugar/lecithin/vanilla 0%. The outputs: cocoa content, total fat, cocoa fat, milk fat, sugar + milk solids — every percentage named, as always.

Two formulas, worked

FormulaWhat comes out
700 g nibs + 300 g sugarCocoa 70.0% · total fat 38.5% — above the floor, no warning
300 g nibs + 150 g cocoa butter + 350 g sugar + 195 g milk powder + 5 g lecithinCocoa 45.0% · cocoa fat 31.5% · milk fat 5.1% · total fat 36.6% — the milk-chocolate shape
600 g nibs + 400 g sugar33.0% fat — BELOW the floor. Solve for 35%: add 30.8 g cocoa butter, cocoa lands at 61.2%

The floor: about 35% total fat is Chocolate Alchemy's melanger minimum (their check runs 35–45% cocoa fat; Dandelion cites 25% as the lowest fat in Beckett's *Science of Chocolate* — below it the melanger labors and may not flow at all).

The melanger run (the Spectra plan)

  1. Preheat the bowl and rollers 10–15 minutes — above 100 °F, below 140 °F.
  2. Load the warm nibs, sugar, milk solids and melted cocoa butter a handful at a time.
  3. Check the mix FLOWS — the fat math above is what makes that true.
  4. Watch the first hours closely; the machine never runs unattended.
  5. Run 12–36 hours total, logging temperature + a taste note at each check.
  6. Taste to judge refinement — it smooths long before it reads done.

Temper: the crystal choreography

Melt OUT the crystal forms, cool to set seed crystals, warm back to the working range — then mold and let it snap. The snap = success; a dull streaky bar = temper lost (re-melt and start again; the app's tempering card carries the working temperatures per chocolate). Batch capacity: match your formula to your melanger's min/max (Chocolate Alchemy's models span 1–100 lb) — the app warns when the total falls outside what your machine can actually run.

Play the run first: the site's Melanger Run game teaches the window (45–53 °C, the stir that refines) — the calculators carry the real formulas: the formulator lives there.