The toffee candy melts as it bakes, which gives these moist, buttery-tasting blondies a soft chewy consistency, perfect with a glass of milk. These bars are great for lunchboxes, a bake sale, or to bring to a party.
Preheat oven to 350 degrees. Line bottom and sides of an 8-inch square baking pan with aluminum foil, with a bit of an overhang on two sides. Set aside.
In a mixing bowl, cream butter and sugar until smooth. Beat in eggs, vanilla, and salt. With mixer on low speed, add flour, and beat until combined. Stir in toffee bits by hand.
Spread batter in prepared pan. Bake cake until golden and a toothpick inserted in center comes out clean, 30 to 35 minutes. Remove from oven; cool completely in pan.
Grasping foil, lift cake from pan. Peel off foil. Using a serrated knife, cut into 16 squares. Store blondies in an airtight container at room temperature up to 5 days.
Toffee bits are little candies you can find in the baking section of your supermarket, near the chocolate chips.