Burger King's Whopper upgrade is a high-stakes bet on premiumization

Burger King announced on Thursday it will be changing its iconic Whopper recipe. Julian Stratenschulte/picture alliance via Getty Images Burger King announced on Thursday that it will "elevate" its iconic Whopper burger recipe. The move comes in response to fan feedback and diners growing more selective about where they spend. Fast-food giants have begun rolling out upgrades to core menu items to lure guests back. Burger King is tweaking its Whopper — and the changes don't just freshen a de...