Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  1                cup  flour -- plus 1 tablespoon
     1/4      teaspoon  baking powder
     1/2      teaspoon  salt
     3/4           cup  unsalted butter
  3             ounces  unsweetened chocolate -- finely chopped
  3                     eggs
  1 1/3           cups  packed brown sugar
  1 1/2      teaspoons  pure vanilla extract
     1/4           cup  sugar
     3/4           cup  creamy peanut butter
     1/4      teaspoon  cinnamon
  6        tablespoons  half and half

Preparation:

Preheat oven to 350 degrees. Grease 9x13x2-inch baking pan. In small bowl, sift 1 cup of the flour, baking powder, and salt. Set aside. In medium saucepan, melt butter and chocolate over very low heat, stirring until smooth. Set aside to cool slightly. In large bowl, combine eggs, brown sugar, and vanilla. Whisk to blend. Stir in melted chocolate mixture. Gradually add flour mixture and stir until blended. Pour into prepared pan. In medium bowl, with electric mixer, combine peanut butter, sugar, cinnamon, half and half, and remaining 1 tablespoon flour. Mixture will be stiff. Drop mixture randomly, by spoonfuls, on top of brownie mixture. Drag knife through peanut butter mixture all over surface, almost touching bottom of pan, to marbleize brownies. Bake about 25 minutes, until firm when touched lightly. Cool thoroughly before cutting.

Nutritional Information:

156 Calories (kcal); 9g Total Fat; (48% calories from fat); 2g Protein; 19g Carbohydrate; 40mg Cholesterol; 64mg Sodium