How to Create a London Fog Using Assam Black Tea
A London fog turns hot tea and steamed milk into a velvety drink, usually built on Earl Grey’s citrusy bergamot profile. This version uses robust Assam black tea as the base, bringing malty depth, briskness and a deeper colour. The result feels closer to a spiced afternoon tea than a delicate Earl Grey latte while retaining the creaminess that defines the style.
Assam is a useful choice because its full-bodied character stands up to dilution. A well-brewed concentrate tastes malty and lightly sweet, with enough strength to remain noticeable beside generous foam. It also gives home brewers room to adjust the drink: use CTC for intensity, choose whole-leaf tea for nuance, or add bergamot for a more traditional nod.
Freshness has a noticeable effect on the final cup. Newly opened tea releases its aromatic oils more readily, and those compounds contribute both fragrance and body. Store the leaves away from heat, light and moisture, and use a clean, airtight container so the cup tastes of Assam rather than the cupboard.
The ideal drink balances concentrated tea, warm milk and a fine layer of foam. Strong milk should not dominate, while flat or boiled milk should not spoil the delicate aromas. The method below produces a repeatable base that works for a single large mug or a small pot for guests.
Select the Right Assam
Start with a fresh, high-grade Assam black tea. A CTC cut gives a fast, bold infusion with generous colour and a clean malty finish, making it especially suitable for mixing with milk. A whole-leaf Assam offers more aromatic detail and a slightly softer texture, so give it a longer steep and a gentler pour.
Taste the dry leaf before brewing if you can. Look for a full, biscuity aroma rather than a dusty or stale smell, and check whether the leaves are dark brown with coppery tips. Loose tea usually provides better control over strength than a small tea bag, while a good CTC leaf can still work well when measured by weight.
Prepare Your Brewing Station
Assemble a teapot or heatproof jug, a fine strainer, a mug and a milk frother or whisk. A thermometer is useful but not essential. The standard starting quantities for one 350 ml mug are 4 g Assam, 250 ml water and 150 ml milk, with room for foam.
Use freshly boiled water and measure in metric units, as many Australian kitchen scales and recipes do. Bring the water to a full rolling boil, then pour it over the tea and cover the vessel while the leaves infuse. This brief trapped-steam stage helps wake up a robust Assam without wasting aroma.
Brew a Strong Tea Concentrate
Put the measured Assam into the pot or jug and add the boiling water. For CTC, steep for about four minutes; for whole-leaf tea, allow three to four minutes and adjust after a few trials. The liquor should be deep amber-brown and strong enough to smell distinctly of tea before milk is added.
Oxidation during processing develops the malty character, colour and briskness that make Assam valuable in a milk-based drink. A technical explanation of oxidation time and strength shows how longer oxidation changes the finished leaf, which is why CTC and whole-leaf grades can behave differently in the pot.
Strain the tea into a second jug or heatproof cup as soon as the steeping time ends. Do not leave the leaves sitting in the liquid, because continued extraction can make the concentrate harsh and tannic. Keep it hot while preparing the milk, and never return the strained tea to the wet leaves.
Steam the Milk Without Scalding It
Warm 150 ml of milk to roughly 60–65°C. It should feel hot but remain comfortable to the touch; steaming beyond that point can flatten the tea’s aromatics and create a chalky aftertaste. Whole milk gives the richest, most stable foam, while low-fat milk produces a lighter result.
Australian supermarkets such as Woolworths and Coles commonly stock fresh and long-life oat milk, which can be a good dairy-free option. Froth barista-style oat milk until it doubles in volume, and add a little more foam if you prefer a café-style finish. Avoid aggressively whipping ordinary milk for too long, which creates large bubbles rather than a fine, velvety layer.
Assemble and Balance the Drink
Pour the steamed milk into your mug, spooning in most of the foam. Add 180–200 ml of the hot Assam concentrate and stir once gently, leaving some foam intact. If you prefer stronger tea, reduce the milk to 120 ml; if the drink seems too robust, add another 30–50 ml of hot water.
Sweeten while the drink is hot, using honey, light brown sugar or plain syrup. Vanilla works well, as does a small amount of bergamot syrup for the classic Earl Grey association. For an authentic bergamot note without syrup, use a prepared Earl Grey blend with Assam rather than adding undiluted essential oil directly to the cup.
Serve It with an Australian Breakfast
Melbourne’s flat-white culture makes a layered milk drink feel at home on the breakfast table, while Sydney and Brisbane brunch habits suit this generous 350 ml serve. The malty tea pairs naturally with buttered toast or a classic Vegemite breakfast, especially when the cup is poured beside the plate rather than served as an after-dinner drink.
Farm-direct relationships with households are part of this Australian food culture, as illustrated by Jerry's Aussie Farm. That interest in provenance also makes it sensible to check an overseas tea seller’s shipping, Australian Customs and biosecurity details before importing loose leaves. Compare the total landed cost, delivery time and packaging, not just the tea price.
Fix Common Brewing Problems
If the London fog tastes weak, the tea was probably under-steeped or too heavily diluted. Brew a fresh concentrate, use the full 4 g of Assam and reduce the milk slightly. If it tastes harsh or drying, shorten the steep by one minute and strain earlier; adding more milk will soften the flavour but will not remove excessive tannins.
A flat foam usually means the milk was too cold, overheated or overwhipped. Heat it again gently, pour it into a jug and froth only until the surface becomes glossy. Lumpy foam can be strained, and a splash of extra hot milk can loosen the drink. For a richer result, use whole milk; for a lighter version, increase the hot water rather than using more milk.
Make the first cup with a dependable CTC Assam, then repeat it with a whole-leaf tea once you know your preferred strength. Loose-leaf Assam lets you adjust extraction, milk ratio and sweetness without being tied to a fixed steeping time, which is especially useful when serving different preferences at once.
Visit Assam1860, choose a fresh, high-grade Assam from its family-estate range, and keep the concentrate hot until it meets the foam. Brew deliberately, pour gently and serve a deeply aromatic London fog today.