HAPPY NEW YEAR!!
If you've never made Millionaire's Shortbread before, no better time than the present to give it a try! Trust me, you won't regret it. While Scottish in origin, millionaire's shortbread is basically a delicious homemade Twix bar with it's crispy shortbread cookie base, soft and chewy caramel filling all topped with rich chocolate.
I'd seen recipes for this treat before on various UK-based sites and actually attempted making them in early 2016 with less than stellar results. That all changed when I saw the version from Cook's Illustrated in the November issue of the magazine. They've never failed me before and this time was no different.
The instructions couldn't be easier to follow and I was delighted with the final cookie. I veered a bit from the original recipe and sprinkled Malden flakes on top of the caramel layer to add a nice salty/sweet contrast. I have to admit that my one trepidation with this recipe was in slicing the bars but in the end my concerns were unfounded. When you're dealing with chocolate it can be a bit finicky but the method CI used to temper the chocolate worked out fantastic and I had no issues whatsoever in portioning the bars.
I gifted the millionaire's shortbread to some friends for the holidays and they were immediately devoured. While I do prefer bittersweet chocolate I think the next time I make these cookies I'll switch it up and use some semisweet or milk chocolate.
Makes 40 bars
2 1/2 cups (12 1/2 ounces) all-purpose flour
1/2 cup (3 1/2 ounces) granulated sugar
3/4 teaspoon salt
1 cup (8 ounces) unsalted butter, melted
1 14 ounce can sweetened, condensed milk
1 cup (7 ounces) packed brown sugar
1/2 cup heavy cream
1/2 cup light corn syrup
1/2 cup (4 ounces) unsalted butter
1/2 teaspoon salt
8 ounces bittersweet chocolate (6 ounces chopped fine, 2 ounces finely grated)
FOR THE CRUST: Adjust oven rack to lower-middle position and heat oven to 350 degrees. Make foil sling for 13 by 9-inch baking pan by folding 2 long sheets of aluminum foil; first sheet should be 13 inches wide and second sheet should be 9 inches wide. Lay sheets of foil in pan perpendicular to each other, with extra foil hanging over edges of pan. Push foil into corners and up sides of pan, smoothing foil flush to pan.
Combine flour, sugar, and salt in medium bowl. Add melted butter and stir with rubber spatula until flour is evenly moistened. Crumble dough evenly over bottom of prepared pan. Using your fingertips and palm of your hand, press and smooth dough into even thickness. Using fork, pierce dough at 1-inch intervals.
Bake until light golden brown and firm to touch, 25 to 30 minutes. Transfer pan to wire rack. Using sturdy metal spatula, press on entire surface of warm crust to compress (this will make finished bars easier to cut). Let crust cool until it is just warm, at least 20 minutes.
FOR THE FILLING: Stir all ingredients together in large, heavy-bottomed saucepan. Cook over medium heat, stirring frequently, until mixture registers between 236 and 239 degrees (temperature will fluctuate), 16 to 20 minutes. Pour over crust and spread to even thickness (mixture will be very hot). Let cool completely, about 1 1/2 hours. [NOTE: This is where I sprinkled about 1 teaspoon of Malden sea salt flakes over the caramel.]
FOR THE CHOCOLATE: Microwave chopped chocolate in bowl at 50 percent power, stirring every 15 seconds, until melted but not much warmer than body temperature (check by holding in palm of your hand), 1 to 2 minutes. Add grated chocolate and stir until smooth, returning to microwave for no more than 5 seconds at a time to finish melting if necessary. Spread chocolate evenly over surface of filling. Refrigerate shortbread until chocolate is just set, about 10 minutes.
Using foil overhang, lift shortbread out of pan and transfer to cutting board; discard foil. Using serrated knife and gentle sawing motion, cut shortbread in half crosswise to create two 6 1/2 by 9-inch rectangles. Cut each rectangle in half to make four 3 1/2 by 9-inch strips. Cut each strip crosswise into 10 equal pieces. (Shortbread can be stored at room temperature, between layers of parchment, for up to 1 week.)