Ingredients

The following ingredients have 24 Servings
  • 1 cup (226g) unsalted butter, (melted)
  • 1 3/4 cups (350g) light brown sugar, (tightly packed )
  • 2 large eggs + 1 egg yolk, (room temperature)
  • 1 ½ teaspoons vanilla extract
  • 2 1/2 cups (285g) all-purpose flour
  • 2 teaspoons cornstarch
  • 1 teaspoon baking powder
  • 1 teaspoon salt
  • 1 1/2 cups (250g) butterscotch chips

Instruction

  • Preheat oven to 350°F (175°C) and prepare a 9x9-inch pan by lining it with parchment paper (or lightly grease and flour). (You could use a 9x13-inch pan for more servings, but the bars will be thinner.)
  • Combine melted butter and brown sugar in a large bowl. Stir well.
  • Add the eggs and the egg yolk, one at a time, stirring well after each addition.
  • Stir in the vanilla extract.
  • In a separate, medium-sized bowl, whisk together the flour, cornstarch, baking powder, and salt.
  • Gradually stir the flour mixture into the butter and egg mixture until completely combined. Stir in butterscotch chips.
  • Spread the batter evenly into the prepared pan. Bake at 350°F (177°C) until edges just begin to turn golden brown (35-40 minutes). If you are using a 9x13-inch pan, bake for 25-30 minutes.
  • Allow to cool before cutting and serving.