Salted Butter Chocolate Chunk Shortbread Food

SALTED CHOCOLATE CHUNK SHORTBREAD COOKIES

Steps:

• Line two rimmed baking sheets with parchment paper. Using a stand mixer fitted with the paddle attachment or an electric hand mixer, beat the butter, both sugars and vanilla on medium-high till it's super light and fluffy (3 to 5 minutes for a stand mixer; 6 to 8 for a hand mixer). Using a spatula, scrape down the sides of the bowl and, with the mixer on low, slowly add the flour, followed by the chocolate chunks, and mix just to blend. If necessary, knead the dough with your hands to make sure the flour is totally incorporated. At this point, the dough should be smooth and feel like Play-Doh with no pockets of flour.
• Divide the dough in half, placing each half on a large piece of plastic wrap. Fold the plastic over so that it covers the dough to protect your hands from getting all sticky. Using your hands, form the dough into a log shape; rolling it on the counter will help you smooth it out, but don't worry about getting it totally perfect. (Don't be afraid to make them compact. Shortbread is supposed to be dense. That's part of why it's so good.) You can also do this using parchment paper, if you prefer, but plastic wrap is easier when it comes to shaping the log. Each half should form a 6-inch log, 2 to 2¼ inches in diameter. Chill until totally firm, about 2 hours.
• Heat the oven to 350 degrees. Brush the outside of the logs with the beaten egg and roll them in the demerara sugar (this is for those really delicious, crisp edges).
• Using a serrated knife, carefully slice each log into ½-inch-thick rounds (if you hit a chocolate chunk, slowly saw back and forth through the chocolate). If the cookies break or fall apart, just press them back together - the dough is very forgiving. Place them on the prepared baking sheets about 1 inch apart (they won't spread much). Sprinkle with flaky salt. Bake until the edges are just beginning to brown, 12 to 15 minutes. Let cool slightly before eating them all.

SALTED CARAMEL SHORTBREAD

Steps:

• Preheat the oven to 350 degrees F. Butter a 9-by-13-inch baking dish, then line with parchment paper, leaving an overhang on 2 sides; butter the parchment.
• Beat 2 1/2 sticks butter, the granulated sugar and 1 teaspoon vanilla in a large bowl with a mixer on medium-high speed until light and fluffy, 3 to 5 minutes. Reduce the mixer speed to low; add the flour and beat until just incorporated.
• Transfer the dough to the prepared baking dish and set a piece of plastic wrap directly on the surface. Press into an even layer, then peel off the plastic. Bake until golden brown, 30 to 35 minutes. Transfer to a rack to cool slightly, then remove from the pan using the parchment. Cut into triangles.
• Make the caramel: Combine the remaining 1/2 stick butter, the brown sugar, corn syrup, heavy cream, espresso powder and kosher salt in a small saucepan over medium heat. Cook, stirring occasionally, until a candy thermometer registers 235 degrees F, about 6 minutes. Remove from the heat and stir in the remaining 1 teaspoon vanilla and the vinegar. Let cool 5 minutes, then drizzle over the shortbread. Sprinkle with sea salt.