I found this delicious blondie recipe in a Better Homes and Gardens magazine earlier this year, and I adapted it to include peanuts and chocolate rather than the almonds in the original recipe. Peanuts and chocolate always seem to be a crowd-pleaser, especially if there are any kids in the party mix.
2 cups packed brown sugar
2/3 cup butter, cut up
2 tsp. vanilla
2 cups all purpose flour
1 tsp. baking powder
1 tsp. baking soda
1½ -2 cups chopped peanuts and chocolate chips, combined
Preheat oven to 350 degrees F. Grease a 13x9x2-inch baking pan; set aside. In a medium saucepan heat brown sugar and butter over medium heat until butter melts and mixture is smooth, stirring constantly. Cool slightly. Stir in eggs, one at a time; stir in vanilla. Stir in flour, baking powder, and baking soda.
Spread batter in prepared baking pan. Sprinkle with nuts and chocolate. Bake in the preheated oven for 25 to 30 minutes or until a wooden toothpick inserted near center comes out clean. Cool slightly in pan on a wire rack. Cut into bars while warm.
Original recipe from Better Homes and Gardens magazine, and at this link: http://www.bhg.com/recipe/blondies/