These layered bar cookies are filled with creamy caramel and topped with flaky sea salt. The recipe also includes a buttery shortbread layer and semisweet chocolate. We'll walk you through how to make millionaire shortbread including tips for mixing up homemade caramel. It's the perfect recipe for holiday baking or any time you need something sweet.

What Is Millionaire Shortbread?

Like other "million dollar" recipes, this dessert recipe earned its name because it tastes like a million bucks. These recipes usually have something added that makes them over-the-top decadent. Here, it's the combination of buttery shortbread, rich caramel, and a thick chocolate topping.

Tips for Making Millionaire Shortbread

Making million dollar bars involves three distinct layers. The process isn't complicated but there are a few things to keep in mind.

• When making the shortbread layer, ensure your butter is room temperature. This will help it cream with the brown sugar properly. It should become light and fluffy—this will take a minute or two.
• Don't worry if the shortbread mixture is crumbly when you press it into the pan, that's how it should look.
  
• Homemade caramel requires a lot of attention. Don't step away while the mixture is boiling, you'll need to stir it frequently to ensure it doesn't burn. It should be a golden color when it's done.
• Let the caramel layer cool completely before adding the chocolate. For the most balanced flavor, choose semisweet chocolate chips.
• Don't skip the flaky sea salt at the end. It's the perfect pairing for the caramel layer.

How to Store Millionaire Bars

Place the million dollar bars in a single layer in an airtight container and cover. Store in the refrigerator up to 1 week or freeze up to 3 months.