Millionaire's Shortbread

Millionaire’s shortbread is the British treat that earns its name. Three distinct layers stack up in one pan: a crumbly, buttery shortbread base, a thick chewy caramel center, and a glossy chocolate shell on top. Each bite gives you the snap of chocolate, the pull of caramel, and the sandy crumble of real shortbread.

The shortbread uses a mix of cake flour and all-purpose flour, which makes it extra tender and fine-grained. Cold butter cut into the flour creates that crumbly texture you want. Bake it just until it barely starts to color, any darker and it’ll taste burnt under all that caramel.

The caramel layer requires a candy thermometer and your full attention. You’re cooking it to hard-ball stage first, then adding cream (carefully, it splatters) and bringing it back down to soft-ball stage. This two-stage process is what gives the caramel that perfect chewy consistency instead of being rock hard or runny.

Chef Tips

• Use a candy thermometer. Guessing caramel temperature rarely ends well.
• Stir constantly once you increase the heat. Caramel scorches fast on the bottom.
• Add the cream slowly and stand back. The temperature difference causes violent bubbling.
• Let the caramel cool completely to room temperature before adding chocolate, or the chocolate won’t set properly.

Variations

• Sprinkle flaky sea salt over the chocolate before it sets for a salted millionaire’s shortbread.
• Use dark chocolate instead of semi-sweet for a more intense, bittersweet top layer.
• Add a teaspoon of vanilla extract to the caramel for extra depth.