Ingredients

The following ingredients have 8 Servings
  • 2 1/2 cups flour
  • 1 cup rolled oats
  • 1 tsp cornstarch
  • 1 tsp baking soda
  • 1 tsp salt
  • 1 cup unsalted butter, at room temperature
  • 1 1/4 cups light brown sugar
  • 1 cup sugar
  • 1 large egg plus 2 egg yolks
  • 1 Tbsp vanilla extract
  • 1 1/4 cups semisweet chocolate chips
  • 1 1/4 cups toffee bits
  • 1/2 cup semisweet chocolate chips
  • Flaky salt

Instruction

  • Preheat oven to 350°F and line a 13 x 9-inch baking pan with parchment paper.
  • Whisk together flour, oats, cornstarch, baking soda, and salt in a medium bowl. Beat butter and sugars in a large mixer bowl at medium speed until creamy. Beat in egg, egg yolks, and vanilla until combined. Reduce speed to low and gradually add flour mixture; beat just until incorporated. Fold in chocolate chips and toffee bits.
  • Scrape dough into prepared pan. Use a piece of parchment paper coated with nonstick spray to press dough evenly across the bottom of the pan. Top with chocolate chips, pressing gently into the dough.
  • Bake for 28 to 32 minutes, until golden and just set in the center. Remove from oven and sprinkle with flaky salt. Let bars cool completely on a wire rack before cutting into squares with a sharp knife.