01 -
Set the oven to 150°C. Get a 23x33 cm baking pan, line it with aluminium foil, and give the foil a light grease.
02 -
In a big bowl, mix together butter, powdered sugar, flour, and vanilla until it's crumbly and sticks when squeezed. Press the dough evenly into the lined pan.
03 -
Put it in the oven for about 40 minutes until it’s lightly golden on top. Let it cool once you take it out.
04 -
While the crust’s baking, throw the butter, salt, corn syrup, sugar, and 120 millilitres of cream into a medium saucepan over low heat. Warm it up gently until the butter's melted, stirring a bit to blend.
05 -
Turn the heat up to medium-low and let it simmer without stirring until it hits 113°C. Stir in the rest of the cream, give it a gentle swirl, then simmer again without stirring until it reaches 113°C once more.
06 -
Take it off the heat and stir in the vanilla. Pour this caramel over the cooled shortbread base and spread it out evenly. Chill for 45 to 60 minutes to firm it up.
07 -
Put the chocolate and 100–120 millilitres of cream into a microwave-safe bowl. Melt them together in the microwave for 30 seconds at a time, stirring in between, until it's just smooth.
08 -
Spread the melted chocolate over the chilled caramel layer using a spatula to make it even. Pop it in the fridge for 3 to 4 hours until it's set.
09 -
Once it's set, carefully take the bars out of the pan and remove the foil. Cut into 32 pieces and let them sit out for a bit before serving so the caramel's at its best texture.