Large heavy-bottomed saucepan (at least 4-quart / 4-litre capacity)
Sugar thermometer
Stand mixer with whisk attachment (or hand mixer)
8-inch (20cm) square cake tin
Greaseproof paper (baking parchment)
Wooden spoon or heat-resistant silicone spatula
Sharp knife for cutting fudge
Ingredients
1 ¾cupssweetened condensed milk(400g tin)
⅔cupwhole milk
2 ¼cupssoft dark brown sugar
½cupunsalted buttercut into cubes
1individualChristmas puddingcrumbled into small pieces
Instructions
Put the sweetened condensed milk, whole milk, soft dark brown sugar, and cubed butter into a large heavy-bottomed saucepan (at least 4-quart / 4-litre capacity).
Turn the heat to low and allow everything to melt together whilst stirring constantly – DO NOT let it stick to the pan. It’s really easily done, so just keep stirring.
Once everything has melted, turn the heat up slightly and keep stirring until the mixture is bubbling.
Insert the sugar thermometer into the pan — the fudge mixture needs to reach 116°C / 240°F (soft-ball stage), which will take between 10–15 minutes. REMEMBER TO KEEP STIRRING!
Once the fudge reaches 116°C / 240°F, remove the pan from the heat immediately. Carefully pour the fudge mixture into the bowl of your stand mixer (or a large heatproof mixing bowl if using a hand mixer). The mixture will be extremely hot — handle with care.
Add the crumbled Christmas pudding to the hot fudge mixture and stir briefly to distribute the pieces.
Set your stand mixer to the highest setting and whisk for about 10 minutes.
Pour the thickened fudge into an 8-inch (20cm) square cake tin lined with greaseproof paper, pressing it into the corners with the back of a spoon. Smooth the top as evenly as possible.
Leave to set overnight at room temperature (at least 8–10 hours). Once fully set, lift out of the tin using the greaseproof paper and cut into bite-sized squares using a sharp knife dipped in hot water for clean edges.
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Notes
Storage: Keep in an airtight container at room temperature for up to 2 weeks, or refrigerate for up to 3 weeks. Separate layers with greaseproof paper to prevent sticking.
Freezing: Freeze in a single layer on a tray, then transfer to a freezer bag. Keeps for up to 3 months. Thaw at room temperature for 1–2 hours.
Make-ahead: This fudge improves after 24–48 hours as the flavours meld. Best made 2–3 days in advance.
Pro tip: When whisking, the fudge is ready when it loses its glossy sheen and becomes thick and grainy-looking. If it still looks shiny, keep whisking.
Substitution: If you cannot find Christmas pudding, use a rich fruit cake crumbled with a splash of brandy.