PREP TIME: 45 MINUTES
COOK TIME: 20 MINUTES
TOTAL TIME: 2 DAYS 65 MINUTES
INGREDIENTS
Toffee
85g unsalted butter
150g light brown sugar, lightly packed
1 tsp kosher salt
Water, as needed
Cookie Dough
226g unsalted butter
4 ice cubes
150g granulated sugar
300g light brown sugar, packed
2 tsp espresso powder
2 tsp kosher salt
½ tsp baking soda
2 large eggs
2 tsp vanilla extract
300g all-purpose flour
168g 50-70% cacao chocolate, chopped
Flaky sea salt, for sprinkling
PREPARATION
- Make the toffee: Line a baking sheet with parchment paper.
- In a medium nonstick saucepan over medium heat, melt the butter, brown sugar, and salt, stirring until evenly incorporated. If there are grainy lumps or if the fat starts to separate, add a couple splashes of water and stir vigorously to emulsify. Continue to cook, stirring constantly, until the mixture reaches 143°C, about 10-15 minutes.
- Pour the toffee onto the prepared baking sheet and spread out slightly with a spatula. Freeze until ready to use, about 30 minutes.
- Make the cookie dough: Add the butter to a medium nonstick saucepan over medium-high heat. Cook, stirring occasionally, until the butter turns dark brown and smells nutty. Watch carefully so the butter does not burn. Remove the pot from the heat.
- Add an ice cube to the butter and slowly let it melt. It may froth and bubble. Add the remaining 3 ice cubes and gently stir until melted.
- In a large bowl, combine the granulated and brown sugar, espresso powder, salt, and baking soda.
- Pour the brown butter into the sugar mixture and mix until combined. Don’t worry if it looks separated.
- In a small bowl, whisk together the eggs and vanilla. Pour into the sugar and butter mixture and whisk until glossy and smooth.
- Add the flour and fold with a rubber spatula to incorporate until the dough has no visible flour streaks.
- Remove the toffee from the freezer (it should be a frozen disc) and break it into chunks that will fit inside a gallon zip-top bag. Double bag the toffee and seal both bags. With a rolling pin, break the toffee into small pieces.
- Fold the crushed toffee and chopped chocolate into the dough until evenly distributed.
- Using a large ice cream scoop or a ½ cup measure, scoop the dough onto a parchment-lined baking sheet. Wrap the baking sheet in plastic wrap, but leave a small opening at the corner of the tray.
- Let the dough rest in the refrigerator for at least 48 hours. This will allow the flavor to develop and the dough to dry out a little as it rests, which will result in less spread when it bakes.
- When ready to bake, preheat the oven to 163°C. Line 2 baking sheet with parchment paper.
- Arrange the cookies on the baking sheets, leaving at least 2 inches of space between the cookies and away from the edges of the pan.
- Bake until the cookies are golden brown with crispy edges, but are still slightly soft in the center, 18-20 minutes. Immediately sprinkle the cookies with flaky sea salt. then let cool completely. The cookies will be very soft at first but will set after they are fully cooled.