Try this Twix Brownies recipe, or contribute your own.
Dutch-process cocoa carries the structural weight in this pastry because its acidity is neutralized during manufacturing, yielding a deeper color and a smoother chocolate flavor than natural cocoa powder. When melted butter and sugars are heated until hot to touch rather than boiling, the sugar begins to dissolve into the fat, creating the dense, fudge-like interior texture characteristic of these bars. Standard commercial shortbread cookie sticks inserted midway through baking absorb moisture from the surrounding batter, anchoring the cookie layer firmly within the crumb. Melting caramel bits with evaporated milk over medium-low heat prevents scorching while producing a pourable sauce that sets firmly upon cooling. Allowing the heavy cream to sit undisturbed over bittersweet chocolate chips for five minutes before stirring initiates emulsion without forcing the cocoa butter to separate. Chilling the completed pan for at least one hour firms the ganache layer for clean slicing. Scaling this formulation requires precise adjustment of pan sizes to maintain the exact ratio of brownie base to shortbread and caramel. Using a bench scraper rather than a standard kitchen knife prevents the sticky layers from dragging during division. Store the finished portions in the refrigerator to maintain the structural integrity of the caramel and ganache.