Dairy Queen Cocoa Fudge

Home reconstruction

The property people are actually trying to reproduce here is not the flavour. It is the texture on contact with cold ice cream — DQ's hot fudge stays thick and slightly chewy rather than running off into a puddle at the bottom of the cup.

Most homemade hot fudge fails at exactly that. It tastes fine and then behaves like chocolate sauce.

Why it holds up

Two things make a fudge sauce stay put on something frozen:

Sugar concentration. A sauce with more sugar and less water thickens rather than thins as it cools. That is why boiling it for a couple of minutes matters — you are driving off water, not just heating it.

Evaporated milk rather than cream or regular milk. Evaporated milk has had most of its water removed already, so you start concentrated and it resists splitting when boiled.

Get those two right and you get the behaviour. Get them wrong and you have a perfectly nice chocolate sauce that runs.

What you need

• 150 g granulated sugar
• 40 g cocoa powder, unsweetened
• 1/4 tsp salt
• 170 ml evaporated milk (one small can)
• 60 g unsalted butter
• 1 tsp vanilla extract

Cocoa powder, not melted chocolate. Melted chocolate sets hard on ice cream and cracks; cocoa keeps it pliable.

Method

1. 1. Whisk the sugar, cocoa and salt together in a saucepan while dry. Cocoa clumps hopelessly if it meets liquid before it has met sugar.
2. 2. Whisk in the evaporated milk until completely smooth.
3. 3. Put it over medium heat and bring to a gentle boil, stirring constantly.
4. 4. Boil for 2 minutes, still stirring. This is the step that decides whether it thickens properly. Do not skip it and do not walk away — cocoa scorches on the bottom fast.
5. 5. Off the heat, stir in the butter and vanilla until the butter has melted and the sauce is glossy.
6. 6. Cool for five minutes before using. It thickens noticeably as it drops below boiling.

Getting the texture right

Do not stop stirring during the boil. The sugar and cocoa settle and burn on the base of the pan in under a minute.

Judge thickness after cooling, not during. It looks alarmingly thin at boiling point and thickens a lot on the way down.

If it goes grainy, the sugar did not fully dissolve before it boiled. Warm it gently with a tablespoon of water and stir until smooth.

Using it

Warm it before serving — 20 seconds in a microwave, stirred. On ice cream, pour it warm and it will firm up on contact, which is the whole point.

It is also good on brownies, in milkshakes, and stirred into hot milk.

Storing

Two weeks in a sealed jar in the fridge. It sets solid when cold and comes back with gentle heat and a stir.

Do not freeze it — the sugar crystallises and it goes grainy on thawing.