Make Ahead: The portioned cookie dough needs to be refrigerated for 1 hour, and up to 5 days, or frozen for up to 3 months. The baked cookies are best eaten the same day they are made, but they can be stored in an airtight container for up to 1 week.
- 16 tablespoons (2 sticks) unsalted butter, at room temperature
- 2⁄3 cup granulated sugar
- 2⁄3 cup packed dark brown sugar
- 1 teaspoon kosher salt
- 2 large eggs
- 1 teaspoon vanilla extract or vanilla bean paste
- 3 cups flour
- 1 teaspoon baking soda
- 6 ounces good-quality milk chocolate, chopped (see headnote)
- 6 ounces good-quality semisweet chocolate, chopped
- 6 ounces Heath toffee bits (may substitute 1 regular-size Heath Bar, chopped)
- Flaky sea salt, such as Maldon (optional)
Combine the butter, both sugars and salt in the bowl of a stand mixer or handheld electric mixer; beat on low speed for 30 seconds, then increase to medium speed and beat for 2 minutes. Stop to scrape down the bowl.
Beat on medium speed for 1 more minute; the mixture should be light and fluffy. Add the eggs and vanilla extract or paste; beat on medium speed for 3 minutes, stopping to scrape down the bowl down again, as needed.
Use a fork to whisk together the flour and baking soda in a bowl, then add to the dough. Beat on low speed to form a soft dough. Add the chopped chocolates and toffee bits, then beat on low speed until well incorporated.
Portion the cookie dough using a #100 disher (about 2 tablespoons per scoop) into a bowl, cover and refrigerate for at least 1 hour, or freeze (see OVERVIEW).
When ready to bake, preheat the oven to 350 degrees convection or 375 degrees for a standard oven. Line baking sheets with parchment paper.
Arrange the dough portions on each baking sheet, spacing them 2 inches apart. Lightly flatten each portion and sprinkle with the flaky salt, if using. Bake (middle rack) one sheet at a time for 10 to 14 minutes, just until the edges are lightly crisped but the middles are still somewhat softened and domed. Let cool on the sheet for 5 minutes, then transfer the cookies to a wire rack to cool completely before serving or storing.
VARIATIONS: Use all dark chocolate or all milk chocolate instead of a combination of the two; use toasted chopped nuts or Reese’s Pieces instead of the toffee bits — or, for a fancy touch, 8 ounces of Valrhona dark chocolate crunchy pearls, available online.
CORRECTION: The portion size given in the previously published recipe was incorrect. It is about a 2-tablespoon scoop, not 1.
From Alex Levin, executive pastry chef of the Schlow Restaurant Group.
Tested by Bonnie S. Benwick; email questions to firstname.lastname@example.org.
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Calories: 220; Total Fat: 12 g; Saturated Fat: 7 g; Cholesterol: 30 mg; Sodium: 90 mg; Carbohydrates: 28 g; Dietary Fiber: 0 g; Sugars: 18 g; Protein: 3 g.