Cooking oil spray, to grease
11⁄2 cups plain flour
375g unsalted butter, softened, finely diced
1 egg yolk
11⁄2 cups brown sugar
1⁄2 cup honey
300g double cream
150g small pretzels, broken into pieces
Preheat oven to 180°C. Grease a 27 x 17cm slice tin with cooking oil spray and line base and sides with baking paper. Put flour and 125g of the butter in a bowl and rub with fingertips until crumbly. Add yolk and 1⁄4 cup of the brown sugar, then mix until combined. Press into tin, then bake for 20 minutes or until just golden.
Meanwhile, mix honey and remaining butter and sugar in a medium saucepan. Cook over a medium heat for 5 minutes or until foamy. Add cream and cook for 10 minutes or until a soft ball forms when a drop of the mixture is added to cold water.
Stir pretzel pieces into caramel, then spread over baked base and bake for 15 minutes or until bubbling. Set aside to cool slightly, then cut into even rectangles to serve.