Cacao Starter — Rehydration & Care

Cacao Sourdough Starter

This guide will walk you through rehydrating your dried cacao sourdough starter and caring for it as it becomes active.

Important note: cacao (cocoa) is here for flavour and colour — it does not feed the starter the way flour does, and too much cacao can slow fermentation. During rehydration, we prioritize flour to build strength, then you can bring cacao back in once the starter is reliably active.

What to Expect (Cacao Starter)

In the first 24–48 hours, it may look quiet. That’s normal.

Cacao starters often show progress through bubbles and aroma before big rise.

Smells will evolve (floury → cocoa / malty → lightly tangy / yeasty).

Because cacao can slow fermentation slightly, this starter may take a bit longer than white — patience and warmth help.

Most cacao starters are ready to bake in 4–7 days.

What You’ll Need

  • Dried cacao sourdough starter (entire packet)
  • Organic unbleached white flour (recommended for rehydration)
  • Optional: cocoa powder (only after the starter is active)
  • Water (warm on Day 1, room temperature after)
  • A small jar or container (loosely covered)
  • A scale (preferred)

Getting Started — Day 1

  1. Add all of the dried starter to a clean jar
  2. Add 50 g warm water (not hot)
  3. Add 50 g white flour
  4. Mix thoroughly until fully combined
  5. Cover loosely and let rest for 24 hours at 20–24°C (68–75°F)

Day 1 notes:

  • The mixture will look darker than a normal starter — that’s expected
  • Focus on warmth and full mixing, not rise

First Feeds — Days 2–4

At this stage, we begin reintroducing cacao gradually while keeping flour as the primary food source.

  1. Keep 50 g starter (discard the rest)
  2. Feed:

    -45 g white flour

    -5 g cacao powder

    -50 g water (room temperature)

  3. Mix thoroughly
  4. Cover loosely and rest 24 hours

Repeat daily.

This keeps cacao at ~10%, which adds flavour without slowing fermentation.

What you may notice:

  • Bubbling and a cocoa-yeasty aroma developing
  • Rise may be modest — this is normal

Warmth is more important than rise at this stage.

Days 4–7 — Building Strength

By this stage, the starter should be waking up and stabilizing. We now increase cacao slightly while maintaining strength.

Daily Feeding (Days 4–7)

  1. Keep 50 g starter (discard the rest)
  2. Feed:

    -40 g white flour\

    -10 g cacao powder

    -50 g water (room temperature)

  3. Mix thoroughly
  4. Cover loosely and rest 24 hours

This brings cacao to ~20%, which deepens flavour while keeping the starter active.

What you should start seeing:

  • Reliable bubbling after feeding
  • A predictable rise (often 25–75%)
  • A balanced cocoa-tangy aroma

If activity slows noticeably, reduce cacao slightly and increase flour.

Adding Cacao Back In (Once Active)

Once your starter is reliably active (bubbles + predictable rise for 2 consecutive feeds), you can begin feeding a small amount of cacao for flavour.

Gentle Cacao Feed (Recommended)

Use this as your “flour” portion:

  • 45 g white flour + 5 g cocoa powder (10% cacao)
  • 50 g water (add a small splash more if the mix feels stiff)

Cocoa can thicken the starter. Aim for a soft paste / thick batter consistency.

If you want a stronger chocolate character later, increase cacao gradually — but most bakers get great flavour at 5–10% cacao.

When Is It Ready?

Your cacao starter is ready to bake when:

  • It shows consistent bubbling after feeding
  • It rises predictably (even if not dramatically)
  • It develops a clean, mildly tangy aroma with cocoa notes
  • It repeats this behaviour for two consecutive feeds

Ongoing Feeding & Care

All feeding ratios are written as: starter : flour : water

Feeding Ratios — When & Why to Use Them

1:1:1 — Maintenance Feeding
Best for regular care.

1:2:2 — Strength Building / Pre‑Bake Feeding
Helpful before baking or if activity seems sluggish.

1:3:3 to 1:4:4 — Slower Fermentation
Useful in warm kitchens or when feeding less often.

Higher ratios (1:5:5 and beyond)
Advanced tools for extended fermentation control.

Rule of thumb:
Higher ratios = slower fermentation + less acidity
Lower ratios = faster fermentation + more acidity

Always discard before feeding, and feed based on activity, not the clock.

Storage Options

Room Temperature

  • Feed once daily
  • Best if baking frequently
  • Keep loosely covered

Refrigerator

  • Feed as usual
  • Refrigerate with a loose lid
  • Feed once weekly when not baking

Common Questions & Troubleshooting

It isn’t rising much
Normal early on. Watch for bubbles and a clean aroma. Keep it warm.

It feels thick after adding cocoa
Cocoa absorbs water. Add a small splash of water to reach a soft paste.

It smells sharp / acidic
Use a larger feed (1:2:2) and keep it slightly cooler.

Using Your Cacao Starter

Cacao starter is excellent for:

  • Chocolate sourdough loaves
  • Focaccia with cocoa notes
  • Enriched doughs (brioche‑style)
  • Adding depth and colour to mixed doughs

If you ever have questions, don’t hesitate to reach out — we’re always happy to help.

Happy baking,
Harvest Baking Co.