- 1/4 cup butter
- 1/2 cup granulated sugar
- 3/4 cup butter, room temperature
- 3/4 cup light brown sugar
- 3/4 cup granulated sugar
- 1 egg plus 1 yolk
- 2 teaspoons vanilla
- 1 tablespoon light corn syrup
- 1 teaspoon baking soda
- 1 teaspoon kosher salt
- 1 tablespoon cornstarch
- 2 1/4 cups flour
- Line a baking sheet with parchment paper and set aside
- In a small heavy sauce pan over low heat bring the butter and sugar to a boil, stirring occasionally. Bring the mixture to 285°F on a candy thermometer, the mixture will become a deep amber color. Immediately remove the pan from the heat, cool for 1 minute and spread the mixture evenly onto the prepared pan. Allow the toffee to cool completely and then using a knife, break it into small pieces.
- In the bowl of your stand mixer fitted with the paddle attachment beat the butter and both sugars together for 2 minutes. Add in the egg, yolk, vanilla, corn syrup, baking soda, salt and cornstarch. Mix for 1 minute on medium, or until the mixture is evenly combined.
- Turn the mixer to low and add in the flour, mixing until just combined.
- Stir the toffee bits into the cookie dough and chill for 1 hour.
- Preheat the oven to 325°F and line a baking sheet with parchment paper.
- Using a medium (2 tablespoon) cookie scoop drop the dough onto the lined baking sheet 3 inches apart. The cookie will spread while baking.
- Bake for 11-13 minutes until the cookies are golden brown at the edges.
- Allow the cookies to cool on the pan for 5 minutes and then transfer them to a wire rack to cool completely.