Butterfinger Blondies

Bahan-bahan (12 porsi)

• 2¼ cups all purpose flour
• 1 teaspoon baking powder
• ¼ teaspoon salt
• ¾ cup (1½ sticks) butter
• 2¼ cups packed light brown sugar
• 3 large eggs
• 1½ teaspoons vanilla extract
• 4 regular-sized Butterfinger candy bars (8.4-ounces total) (crushed)