Brewing a chai spiced porter at home with whole spices
A chai porter uses the spices of masala chai over a chocolatey porter base. Whole spices give cleaner flavour than ground ones. Dosing them separately, by taste, is how you stay in control.
Why chai suits a porter
A porter brings chocolate, caramel and gentle roast. Masala chai brings cardamom, cinnamon, ginger, clove and black pepper, usually with milk and sugar. Those spices work with sweet, dark flavours. A pale beer shows every spice too sharply. A porter softens them.
Aim for a moderate base: original gravity around 1.055 to 1.060, about 5.5% ABV and 25 to 30 IBU. Higher bitterness fights the spices. Our robust porter guide gives a base recipe you can adapt with a little more crystal malt for sweetness.
Whole spices, from a fresh masala dabba
Ground spices cloud the beer and lose aroma fast. Whole spices hold their oils and are easy to strain out. For 20 litres, a starting set:
- 6 to 8 green cardamom pods, lightly cracked
- One 5 cm stick of cinnamon
- 15 to 20 g of dry ginger slices, or 30 g of fresh ginger
- 2 cloves
- 5 to 6 black peppercorns, cracked
A note on cinnamon: most cinnamon sold in Indian markets is cassia, which is stronger and harsher than true Ceylon cinnamon. If you have cassia, use half the amount. The clove count is deliberately low. Clove is the spice most likely to take over a beer. Two cloves in 20 litres is plenty for a first attempt.
Make a tincture instead of boiling the spices
You can add spices at flameout, but boiling drives off the delicate aromas and you cannot adjust the dose afterwards. A tincture gives control:
- Put each spice in its own small jar.
- Cover with 30 to 50 mL of plain vodka and seal.
- Leave for three to five days, shaking daily.
- Strain each jar.
The alcohol extracts the flavour and keeps everything sanitary. Each spice now sits in its own bottle, which means you can blend them like a chai wallah adjusts a pot.
Dose by bench trial, not by recipe
Once the porter has finished fermenting, pour 200 mL samples. Using a measuring syringe, add tincture a few drops at a time, starting with cardamom and cinnamon, then ginger, then clove and pepper. Write down every drop. When a sample tastes right, scale it up: if 0.4 mL works in 200 mL, you need 40 mL in 20 litres.
This is the floor habit we would push on anyone brewing spiced beer. It takes half an hour and removes guesswork from the riskiest part of the recipe.
Too much clove tastes numbing and medicinal. Too much pepper scratches the throat. Too much ginger burns. Dilution is the only fix, either by blending with unspiced porter or by brewing a second batch. This is exactly why the dosing is split by spice. Learning how spices, malt and yeast interact so you can design a beer like this on paper is a skill that rewards formal practice.
Tea, milk and sugar
Chai without tea is only masala. If you want a tea note, cold steep 10 to 15 g of Assam CTC in 500 mL of boiled and cooled water in the fridge for 12 hours. Cold steeping extracts less tannin than hot brewing, so the tea is less harsh. Add it to the bench trials like any tincture.
For the milky sweetness, some brewers add lactose, around 300 to 500 g in the boil for 20 litres. Lactose is not fermented by brewing yeast, so it leaves body and gentle sweetness. Label it clearly, because people with lactose intolerance will want to know.
Ferment clean so the spices lead
A clean ale yeast at 18 to 19 °C keeps the base neutral. Warm, fruity fermentation adds banana and pear notes that clash with cardamom. Use a fridge or water bath to hold the temperature through the first four days, as in our temperature control guide. Add the tinctures at packaging, carbonate to about 2.2 volumes and taste again after two weeks. Spice aroma fades with time, so a chai porter is best fresh.
Serving it with food
A chai porter wants food with similar warmth. Try it with samosas, onion pakoras or a plate of Parle-G style biscuits for a direct chai pairing. Desserts work too, especially gajar halwa or a chocolate brownie. Serve it at 10 to 12 °C. Too cold and the spices go quiet; too warm and the alcohol starts to show.
Start the tinctures before brew day
Set up five small jars this weekend, one per spice. Start the vodka tinctures. Even before you brew, a drop of each in a glass of shop-bought stout tells you a lot about which spices you like and in what proportion.
Common questions
Should I use whole or ground spices?
Whole spices. They give cleaner flavour, hold aroma longer and are easy to strain out. Ground spices cloud the beer.
When do I add the spices?
We prefer vodka tinctures dosed at packaging after a bench trial, which gives the most control. Flameout additions work but cannot be adjusted later.
How many cloves go into 20 litres?
Start with two. Clove dominates quickly and you can always add more through a tincture.
Can I add tea to a chai porter?
Yes. Cold steep Assam tea and add it during bench trials. Cold steeping extracts less tannin than hot brewing.
