The Great British Bake Off‘s Josh Smalley has prepared a science-led chocolate and caramel Swiss roll recipe. Not only is it a perfect crowd-pleaser, it showcases some complex chemistry.
Pour into the tin and bake for 35–40 minutes or until fudgy when tested with a skewer. Allow to cool in the tin completely. Remove the brownie from the tin and spread with the caramel. Top with the ...