How to Brew Tea in Bulk for Canteens, Offices and Large Kitchens

Brewing tea for 10 people is forgiving. Brewing for 200 people — consistently, without bitterness, across a full service window — requires a system. This guide is for canteen managers, kitchen supervisors, and procurement heads who need reliable, repeatable output at scale.

Equipment You Need

Equipment	Minimum Spec	Notes
Brewing vessel	20–50 litre stainless steel	Aluminium works but affects flavour over time
Strainer	Fine mesh, minimum 30 cm diameter	Avoid coarse mesh — CTC dust passes through
Ladle	Long-handle, 500 ml	For stirring and portioning
Holding vessel	Double-jacket or bain-marie	Keeps tea without continued cooking
Thermometer	Basic probe thermometer	Prevents overheating during hold

You do not need expensive equipment. The investment is in consistency of method, not hardware.

Tea Quantity Reference Table

This assumes Assam CTC dust, milk-based tea (60% milk, 40% water), and 200 ml cups.

Cups	Water	Milk	CTC Dust	Spice (optional)	Time
25	2 L	3 L	75 g	30 g	8 min
50	4 L	6 L	150 g	60 g	10 min
100	8 L	12 L	300 g	120 g	14 min
250	20 L	30 L	750 g	300 g	20 min
500	40 L	60 L	1.5 kg	600 g	30 min

These are starting ratios. Adjust based on your specific CTC grade and customer preference — some canteen users prefer stronger or lighter tea.

The Standard Bulk Brewing Method

Step 1 — Measure precisely The most common canteen problem is inconsistency from batch to batch. Use a kitchen scale, not approximate scoops. 10g variance per litre compounds significantly at 100-cup scale.

Step 2 — Heat water first Bring water to 80°C (not full boil) before adding tea. Adding CTC dust to cold water and then heating produces flat, under-extracted tea.

Step 3 — Add tea and spices to hot water Add CTC dust and any dry spice blend (ginger, cardamom) when water is at 80°C. Bring to a rolling boil, then reduce to medium simmer for 2–3 minutes. This water-only extraction step is critical — skipping it produces weak tea that disappears into milk.

Step 4 — Add cold milk Add cold full-fat milk to the tea concentrate. The temperature drop stops extraction before you bring it back to temperature.

Step 5 — Return to boil, then cut heat Bring to a single boil after adding milk. Immediately reduce to the lowest heat setting or remove from flame. Do not continue boiling — milk proteins break down and the tea turns acrid within minutes.

Step 6 — Strain into holding vessel Strain through fine mesh into your double-jacket holding vessel. Hold at 70–75°C.

Service Time Limits

This is the single most violated rule in canteen tea service:

Optimal service window: 0–30 minutes after brewing
Acceptable: 30–45 minutes (light quality decline)
Problematic: 45–75 minutes (noticeable bitterness)
Discard: Beyond 75 minutes — do not serve

If your peak service window is 7:30–9:30am and you start brewing at 7:00am, you need at least 3 batches to maintain quality across the full window.

Calculating Daily Tea Requirement

For procurement purposes:

Formula: Daily CTC dust (grams) = cups served per day × 6 to 8 g per cup

Daily Volume	Daily Dust	Monthly Requirement
100 cups	600–800 g	18–24 kg
250 cups	1.5–2 kg	45–60 kg
500 cups	3–4 kg	90–120 kg
1,000 cups	6–8 kg	180–240 kg

Build in a 10% buffer for spillage, testing, and variable demand days.

Common Bulk Brewing Problems

Tea too bitter:

Batch held too long on heat after milk was added
Too much tea per litre — reduce by 10%
Water quality issue (high TDS water extracts more aggressively — if your water is above 300 TDS, reduce tea quantity)

Tea too weak / light colour:

CTC grade too coarse (using fannings instead of dust)
Insufficient simmer time in water-only stage
Milk proportion too high — reduce to 55% milk

Inconsistent across shifts:

Different staff members measuring differently — switch to weight-based portioning
Pre-measure daily quantities in sealed bags to standardise

Curdling:

Milk was already close to expiry
Boiling too hard after milk addition — reduce heat immediately after single boil

Storage of Bulk Tea

Store CTC dust in airtight containers away from light, moisture, and strong odours
Do not store near spices or cleaning chemicals — tea absorbs ambient smells
Shelf life: 18 months from manufacture date; once opened, use within 3 months
Never mix old and new stock in the same container

Supply from TrueBlend Marketing

We supply Assam CTC tea dust to canteens, corporate offices, and institutional kitchens across Bangalore. Pack sizes: 5 kg, 10 kg, 25 kg, 50 kg. GST invoice with every order. WhatsApp +91-8807237891 for bulk pricing.