Door Seven  ·  Buna Culinary  ·  Page 3

The Preparations

Seventeen foundational preparations. One variable at a time. Start at the beginning and move only when the previous preparation is understood.

Reference Leaf Material for This Manual The preparations here use one processing family as a consistent reference point: mature healthy leaves, rinsed, shade-withered 12–24 hours, then dehydrated at 45–50°C until crisp. Fifth to seventh leaf position from branch tip. Store airtight after cooling completely. This is not the only valid starting material. Fresh leaf, oxidised leaf, roasted leaf, and koji-treated leaf each belong to different processing families and will produce different results. Where a preparation specifically calls for roasted leaf, that is noted. All other preparations assume the reference material above unless you choose to vary it — and varying it is part of the work. One important note on taste: coffee leaf is not a high-bitterness ingredient. Its bitterness is usually low, and often less central than its green, mild, sweet-returning, lightly drying character. Under extended wet heat, harshness often decreases and sweetness may increase. This is the opposite of what tea drinkers expect. Approach each preparation with that in mind.
Preparation Leaf Water Ratio / Logic
Baseline infusion4 g250 g1 : 62.5
Light daily cup2–3 g250–300 gGentler daily trial
Decoction4 g400 g, reduced to ~250 gStart high — evaporation
Long decoction6 g500 g, reduced to ~250 gTraditional / heavier cup
Batch decoction40 g4,000 g, reduce to 2,500 g1 : 100 starting ratio
Part I — The Primary Preparations

The leaf in water

Everything else begins here. These preparations isolate temperature, time, and concentration. No additions.

1
Extraction · Water · Baseline

Simple Infusion

The reference cup. Everything else is compared against this.

Ingredients
Dried Buna leaf4 g
Water250 g
Method
  1. 1Heat water to 95°C.
  2. 2Place dried leaf in a pre-warmed cup or small pot.
  3. 3Pour water over the leaf. Cover.
  4. 4Infuse 6 minutes. Do not squeeze the leaf for the first tasting.
  5. 5Strain fully and serve.
ServingServe plain. Taste hot, warm, and at room temperature before judging.
ScalingFor 1 litre: 16 g leaf + 1,000 g water. Keep the 1 : 62.5 ratio.
2
Extraction · Water · Time

Extended Infusion

What time alone extracts, without boiling.

Ingredients
Dried Buna leaf4 g
Water250 g
Method
  1. 1Heat water to 95°C.
  2. 2Add leaf and water to a covered vessel.
  3. 3Infuse 15 minutes. Strain.
  4. 4Record how body changes with time. Note whether sweetness becomes more perceptible as extraction extends.
ServingTasting cup. Not necessarily a daily drink.
Scaling8 g leaf + 500 g water. 16 g + 1,000 g.
3
Extraction · Water · Temperature

Cold Infusion

Sweetness and aftertaste that heat can hide.

Ingredients
Dried Buna leaf4 g
Cold drinking water250 g
Method
  1. 1Combine leaf and water in a clean jar. Cover.
  2. 2Refrigerate 8–12 hours.
  3. 3Strain without pressing hard.
  4. 4Taste cold first, then allow a portion to reach room temperature.
ServingServe chilled in a small glass.
Scaling16 g leaf + 1,000 g water for a 1 litre jar.
4
Extraction · Heat + Water · Foundation

Decoction

The first preparation where Buna begins to behave like broth.

Ingredients
Dried Buna leaf4 g
Water400 g
Method
  1. 1Add leaf and water to a small pot. Bring to a boil.
  2. 2Lower to a steady simmer, partly covered.
  3. 3Simmer 20 minutes. Aim for a final volume near 250 g.
  4. 4Add a little hot water if reduced too far. Strain and serve.
ServingHot as a small cup, or alongside food as a meal beverage.
ScalingStarting ratio 1 : 100. For 10 cups: 40 g leaf + 4,000 g water, reduce to ~2,500 g.
5
Extraction · Heat + Water · Intensity

Long Decoction

A heavier preparation. Extended boiling may increase sweetness perception and depth — the opposite of what tea logic would suggest. Use after the simple decoction is understood.

Ingredients
Dried Buna leaf6 g
Water500 g
Method
  1. 1Add leaf and water to a pot. Bring to a boil.
  2. 2Simmer 30 minutes, partly covered. Reduce to 250–300 g.
  3. 3Strain. Rest 2 minutes before serving.
ServingServe alongside starchy food — rice, kanji, kappa, bread, grains. This preparation is not designed for empty-stomach consumption. The food context is part of the recipe.
Scaling6 g leaf + 500 g water per serving. For 5 servings: 30 g + 2,500 g water.
Part II — The Companions

Controlled interventions

Not additions for complexity. Each one isolates a single force — salt, ginger, curry leaf — to understand what it does to the leaf before combining them.

6
Extraction · Salt · Savoury Rounding

Salted Buna

Salt moves the drink toward food. Observe savoury rounding and dryness reduction.

Ingredients
Prepared Buna decoction250 g
Salt0.5–0.8 g
Method
  1. 1Prepare a standard decoction.
  2. 2Add 0.5 g salt first. Stir and taste.
  3. 3Increase only to 0.8 g if needed.
ServingWarm with rice, kanji, or a simple lunch.
ScalingSalt range 0.2–0.3% of final liquid weight. For 1,000 g decoction: 2–3 g salt.
7
Extraction · Aromatic · Lift

Buna with Ginger

Ginger should lift the leaf, not become ginger tea.

Ingredients
Dried Buna leaf4 g
Water400 g
Fresh ginger, thin slice2–3 g
Method
  1. 1Add leaf, water, and ginger to a pot. Bring to a boil.
  2. 2Simmer 15–20 minutes. Strain.
  3. 3Taste before adding salt.
ServingWith meals or as a warm evening cup after food.
ScalingGinger at 0.5–0.75% of starting water. For 1,000 g water: 5–7.5 g ginger.
8
Extraction · Aromatic · Cultural Bridge

Buna with Curry Leaf

Curry leaf should give familiar memory without hiding the coffee leaf.

Ingredients
Dried Buna leaf4 g
Water400 g
Fresh curry leaves2–3 leaves
Method
  1. 1Add leaf, water, and curry leaves to a pot. Bring to a boil.
  2. 2Simmer 15–20 minutes. Strain.
  3. 3Compare directly with the plain decoction.
ServingWith rice-based meals. Test without other spices first.
Scaling1 fresh curry leaf per 125–150 g starting water. Keep restrained.
Part III — The Table

Buna alongside food

These are not beverages served with a meal. They are meal liquids — designed to sit at the table the way rasam or buttermilk does. The food context is part of the preparation.

9
Extraction · Salt + Aromatic · Table

Kerala Meal Beverage

The strongest candidate for a table pathway. Buna, ginger, curry leaf, salt.

Ingredients
Dried Buna leaf4 g
Water400 g
Fresh ginger2 g
Fresh curry leaves2 leaves
Salt0.5 g
Method
  1. 1Add leaf, water, ginger, and curry leaves to a pot. Bring to a boil.
  2. 2Simmer 15–20 minutes. Strain.
  3. 3Add salt after straining and adjust lightly.
ServingIn a small tumbler alongside lunch. Treat as a meal liquid, not tea.
ScalingPer 1 litre starting water: 10 g leaf, 5 g ginger, 5–6 curry leaves. Salt 0.2–0.3% of final liquid after reduction.
This preparation is not specific to any one cuisine. A cook in any kitchen with a starch-based meal and access to ginger can test it. The aromatics are local to the author. The logic is universal.
10
Extraction · Salt · Table

Rice Companion

The test is whether Buna completes the meal or distracts from it.

Ingredients
Buna decoction200–250 g
Salt0.4–0.6 g, optional
Method
  1. 1Prepare standard decoction. Keep warm.
  2. 2Serve in a small tumbler beside rice.
  3. 3Taste with plain rice first, then with vegetable sides.
ServingBest with simple meals where the leaf can be noticed. The starch base is the point — rice, bread, grain, potato, cassava.
ScalingFor 4 people: 1 litre final decoction. Start with ~1,600 g water + 16 g leaf.
11
Extraction · Simplicity · Table

Kanji Companion

Kanji exposes flaws. If the Buna is rough, this service will show it.

Ingredients
Dried Buna leaf3 g
Water350 g
Salt0.4 g, optional
Method
  1. 1Simmer leaf and water 15 minutes. Strain.
  2. 2Add a very small amount of salt if desired.
  3. 3Serve warm beside kanji, not mixed in first.
  4. 4Sip between spoonfuls. Later test pouring a small amount into the gruel.
ServingAny rice gruel, porridge, or congee. The logic transfers across cuisines — the question is how the leaf sits alongside a plain starchy liquid.
ScalingFor 1 litre final: ~12 g leaf + 1,400 g water, reduced and salted lightly.
Part IV — The Broth

Closer to food than tea

This is where extraction becomes culinary. Clarity matters.

12
Extraction · Salt + Aromatics · Savoury

Clear Buna Broth

A savoury strained preparation. Clarity matters.

Ingredients
Dried Buna leaf4 g
Water450 g
Fresh ginger2 g
Small shallot, optional5–8 g
Curry leaves2 leaves
Salt0.6 g
Method
  1. 1Add all ingredients except salt to a pot. Bring to a boil.
  2. 2Simmer 20 minutes. Strain through a fine sieve.
  3. 3Add salt after straining. Serve clear, without floating solids.
ServingAs a small first cup before a simple meal, or with rice. Clarity is the point — it signals intention.
ScalingPer 1,000 g starting water: 9 g leaf, 4–5 g ginger, 1 small shallot, 5 curry leaves. Salt 0.25% of final liquid.
Part V — The Roasted Leaf

Heat as a flavour tool

Dry roast creates compounds that were not in the leaf before. Dark roast may erase leaf character entirely. Light roast is the working territory.

13
Dry Heat · Maillard · Infusion

Dry-Roasted Buna Infusion

Compare directly with the unroasted baseline.

Ingredients
Dried Buna leaf4 g
Water250 g
Method
  1. 1Heat a dry pan on low.
  2. 2Add leaves. Move constantly. Stop when aroma becomes warm and slightly toasted — before any smoke appears. Do not blacken.
  3. 3Transfer immediately to a cool plate.
  4. 4Infuse with 95°C water for 6–8 minutes. Strain.
ServingServe plain. The comparison with unroasted leaf is the preparation.
ScalingRoast only the leaf needed for the session. For 1 litre infusion, roast 16 g.
14
Dry Heat · Maillard · Decoction

Roasted Buna Decoction

May become more acceptable to people who find green leaf notes difficult.

Ingredients
Dry-roasted Buna leaf4 g
Water400 g
Method
  1. 1Lightly dry-roast the leaf as in preparation 13.
  2. 2Add roasted leaf and water to a pot. Simmer 15–20 minutes. Strain.
  3. 3Taste plain before adding salt or ginger.
ServingHot with food, or cool and taste chilled.
ScalingFor 5 servings: 20 g roasted leaf + 2,000 g water, reduce to ~1,250 g.
Part VI — Chilled

Cold service

Cold often changes sweetness, aroma, dryness, and mouthfeel dramatically.

15
Extraction · Temperature · Contrast

Chilled Decoction

A cooked preparation served cold. Sweetness, dryness, and mouthfeel change.

Ingredients
Prepared Buna decoction500 g
Method
  1. 1Prepare a plain decoction. Strain while hot.
  2. 2Cool uncovered until steam has escaped.
  3. 3Refrigerate 4–8 hours.
  4. 4Taste cold without ice first.
ServingChilled in a small glass. Good for comparing dryness, sweetness, and aftertaste against the hot preparation.
ScalingAny decoction can be chilled. Make 1 litre final volume for tasting groups.
Part VII — Milk

Fat and protein as moderators

Milk proteins bind a portion of the phenolics. Dryness softens. This is the Engere pathway — the oldest documented coffee leaf tradition. Zero adverse events across nearly 400 households in the Gofa Zone study.

16
Extraction · Fat + Protein · Traditional

Milk Beverage

Milk can soften dryness but can also hide the leaf. Keep the first trial restrained.

Ingredients
Strong Buna decoction150 g
Milk100 g
Salt, tiny pinchoptional
Method
  1. 1Prepare a strong decoction: 5 g leaf + 350 g water simmered to ~180 g.
  2. 2Warm milk separately.
  3. 3Combine 150 g decoction with 100 g milk. Do not boil hard after milk is added.
  4. 4Add only a tiny pinch of salt if testing the salted style.
ServingWarm with food or as a separate tasting cup. Dairy alternatives — oat, coconut, nut milks — will each interact differently with the phenolics and are worth testing separately.
ScalingStarting structure: 60% decoction, 40% milk. Adjust only after tasting.
Part VIII — Comparative Tasting

The engine of the project

A method for learning rather than a single dish. Choose one variable only. Keep everything else identical.

17
All modes · One variable · Observation

Comparative Tasting Set

Comparative tasting is the engine of the Buna project.

Per sample
Leaf4 g
Water250 g
SamplesA, B, C
Method
  1. 1Choose one variable only: leaf age, wither, roast level, or brew method.
  2. 2Keep all other quantities identical.
  3. 3Brew each sample at the same time in identical vessels.
  4. 4Taste hot, warm, and room temperature.
  5. 5Record: aroma, sweetness, dry edge, body, aftertaste, food compatibility.
Suggested setsYoung vs mature leaf · Fresh vs withered · Withered vs roasted · Infusion vs decoction · With food vs without
Scaling for groups8 g leaf + 500 g water per sample. Pour 50 g servings. Serve in identical small cups. No snacks during first evaluation.
Leaf position noteYoung leaf: positions 1–3 from branch tip. Mature leaf: positions 5–7. Keep position consistent within each sample.
Reference

Priority map

Which preparations to reach for, by intent.

Intent Start with
Daily baseline1 — Simple infusion, 4 — Decoction
Table pathway9 — Kerala meal beverage, 10 — Rice companion, 11 — Kanji companion
Traditional bridge5 — Long decoction, 6 — Salted Buna, 16 — Milk beverage
Flavour development13 — Roasted infusion, 14 — Roasted decoction, 15 — Chilled decoction
Aromatic exploration7 — With ginger, 8 — With curry leaf, 12 — Clear broth
Research engine17 — Comparative tasting set
Buna does not need to carry the entire spice garden. Each preparation should ask: what does the leaf need here? If the food asks for ginger, use ginger. If the leaf is already speaking clearly, leave it alone.
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