Preheat your oven to 350F/180C for a conventional oven.
Rub the butter into the flour until it looks like breadcrumbs. Then add the sugar and mix well.
Spread over a lined traybake tin, I used my 8″/20cm square tin, and press down well. This will seem a little crumbly, but it comes together once baked.
Bake in for 20-25 minutes or until golden. Then allow to cool slightly while you make the caramel. A few cracks may appear in the base, don’t panic as these will be covered with gooey caramel anyway.
To make the caramel layer, place the butter, syrup, sugar and condensed milk in a small saucepan.
Melt over a low heat, stirring frequently until the mixture starts to simmer and let it bubble for a few minutes. Remove from heat and pour over the base. Let this sit at room temperature before placing in the fridge to set.
Melt the chocolate, then spread over the caramel and place in the fridge for a couple of hours, at least. When set, cut into small, sticky pieces. Or large sticky pieces. There’s no judgment here.