1 1/2 cups firmly packed brown sugar
1/2 cup sugar
2 teaspoons vanilla
2 1/4 cups all-purpose flour
1 1/2 teaspoons baking powder
1 teaspoon salt
1 cup chopped salted peanuts*
1 cup toffee bits or milk chocolate toffee bits
4 (1-ounce) squares bittersweet baking chocolate, melted
Heat oven to 350°F. Line 13x9-inch baking pan with aluminum foil, extending foil over edges. Butter foil; set aside.
Combine brown sugar, butter and sugar in bowl; beat at medium speed until creamy. Add eggs and vanilla; continue beating until smooth. Add flour, baking powder and salt; beat at low speed until well mixed. Stir in peanuts and toffee bits.
Place 2 cups batter into bowl. Spread remaining batter into prepared pan. Add melted chocolate to reserved batter; mix well. Spread chocolate mixture over batter in pan.
Bake 28-33 minutes or until toothpick inserted in center comes out clean. Cool completely. Sprinkle bars with powdered sugar. Lift bars from pan using foil ends. Cut into bars.
*Substitute your favorite nut, such as walnuts, pecans and/or cashews.
Bars can be frozen for up to 1 month.