Hojicha Ice Cream — roasted-tea ice cream with deep caramel notes

i. Origin & history

Hojicha itself is a twentieth-century invention with a specific and well-attested origin: it is generally credited to a tea merchant in Kyoto in the 1920s who roasted leftover, lower-grade tea — stems, twigs and coarse leaves that would otherwise have been hard to sell — over charcoal. Roasting transformed the material completely, and what had been surplus became a category.

That origin explains a great deal about the tea. Hojicha is made from bancha and often includes kukicha (stems and twigs), which are naturally lower in caffeine than the young leaves used for sencha or matcha. The roasting reduces caffeine further. The result is a tea served to children and to the elderly in Japan, and drunk in the evening and after meals without concern.

Roasting also changes the flavour chemistry entirely. The grassy, vegetal, umami character of unroasted green tea comes largely from amino acids and chlorophyll; roasting drives Maillard reactions that generate toasty, nutty, caramel and woody notes instead, and destroys much of the catechin bitterness. Hojicha is markedly less astringent than matcha.

As a dessert flavour, hojicha has grown substantially in the last decade or so, both in Japan and internationally, and it now appears routinely alongside matcha in ice cream, lattes, cakes and soft-serve. Kyoto, where the tea was created, remains its strongest association.

ii. Infusing tea into dairy

Getting real hojicha flavour into ice cream is a straightforward infusion problem with a few specific traps.

The most effective method is a hot steep followed by a cold rest. Heat the milk and cream to just below a simmer, take it off the heat, add the hojicha leaves, cover and leave to infuse. Twenty to thirty minutes gives good extraction. Some recipes then leave the mixture in the refrigerator overnight with the leaves still in, which deepens the flavour further — hojicha is forgiving of long steeping in a way that matcha and sencha are not, because there is far less catechin bitterness to extract.

That forgiveness has limits. Steeped in liquid held at a genuine simmer for a long time, hojicha does eventually turn bitter and slightly ashy. The rule is to infuse off the heat, not over it.

The choice between leaf and powder matters. Hojicha leaf, infused and strained out, gives a cleaner, more aromatic result and a pale tan colour. Hojicha powder, whisked in and left, gives a stronger, more intense flavour, a darker colour and a very slightly gritty body. Many good recipes use both — leaf for the infusion, a spoonful of powder whisked in at the end for depth and colour.

The base itself is a standard custard, and the usual ice cream rules apply: cook to around 82 °C, chill thoroughly, and remember that tea flavour is subtle and that freezing mutes flavour considerably. A base that tastes correctly balanced at room temperature will taste under-flavoured frozen, so it should be steeped somewhat stronger than seems right.

iii. Ingredients

Makes 8 servings · scroll the side panel to adjust

• 400 ml whole milk
• 20 g hojicha leaves
• 300 ml double cream
• 120 g caster sugar
• 5 egg yolks
• 1 pinch salt

Use good hojicha — the difference between a cheap and a decent one is very obvious in a dessert where it is the only flavour. Leaf for infusing, and optionally hojicha powder whisked in at the end for a deeper colour and stronger flavour. Egg yolks give a smoother, richer base and a texture that suits the toasty flavour, though an eggless base works. Use whole milk and double cream. Keep the sugar moderate: hojicha's appeal is its roasted, slightly bitter character, and an over-sweet base flattens it. A pinch of salt sharpens the roasted notes considerably.

iv. Method

1. Warm milk with hojicha leaves to just below simmer. Off heat, steep 15 minutes. Strain through fine sieve, pressing leaves.
2. Whisk yolks with sugar until pale. Whisk in the hojicha milk and the cream. Cook over low heat to 82 °C / 180 °F, stirring constantly. Strain.
3. Chill at least 4 hours.
4. Churn until thick. Freeze 3 hours to firm.

v. Tips & common mistakes

• Infuse off the heat. Bring the dairy to just below a simmer, then remove it from the heat before adding the tea. Held at a simmer, hojicha eventually turns bitter and ashy.
• Steep stronger than tastes right. Freezing mutes flavour substantially. A base that seems correctly balanced when warm will taste weak once frozen, so aim for a noticeably strong infusion.
• Consider an overnight cold steep. Leaving the leaves in the chilled base overnight deepens the flavour considerably, and hojicha tolerates long steeping far better than matcha or sencha because there is much less bitterness to extract.
• Strain thoroughly, then strain again. Through a fine sieve and then, if you can, through muslin. Tea leaf fragments in ice cream are unpleasant and easy to miss until it is frozen.
• Add a spoonful of powder for colour and depth. Leaf infusion alone gives a pale tan and a delicate flavour. Whisking in a little hojicha powder at the end gives the deeper brown and the fuller flavour most people expect.
• Keep the sugar down. The point of hojicha is its roasted, faintly bitter character. Over-sweetening buries exactly the thing you made it for.

vi. Variations

Hojicha latte ice cream uses a higher proportion of milk to cream for a lighter result. Hojicha and black sesame is a natural pairing, as is hojicha with kinako (roasted soybean flour), both of which lean into the toasted register. Hojicha soft-serve is widespread in Japan, particularly in Kyoto. A hojicha and white chocolate version works well, the caramel notes of the tea meeting the dairy sweetness. For contrast, black sesame ice cream and matcha ice cream are the obvious companions on a Japanese ice cream menu.

vii. Serving & storage

Hojicha ice cream is served in scoops, and it takes well to Japanese accompaniments — a spoonful of anko, a few shiratama rice balls, a drizzle of kuromitsu, or a scattering of toasted black sesame. It is also very good simply on its own. Because the flavour is delicate, let it soften for five to ten minutes before serving; served hard from the freezer, much of the aroma is lost.

It keeps for up to two months in an airtight container in the freezer with cling film pressed against the surface, though the tea aroma fades noticeably after the first few weeks — this is a flavour that is best eaten young. Freezer odours are a particular risk here, since the flavour is subtle enough to be overwhelmed; keep it sealed and away from anything strong. Never refreeze it after melting, as the texture will not recover.

ix. More from Japanese

• Black Sesame Ice Cream — intensely nutty Japanese gelato
• Frozen Custard — Midwest egg-yolk soft-serve
• Monaka — wafer ice-cream sandwich
• Mochi Ice Cream — ice cream wrapped in mochi
• Matcha Roll Cake — green-tea sponge roll
• Bastani — Persian saffron-rosewater ice cream