ZEBRA BARS

Steps:

• Preheat oven to 350°.
• Butter a 13 x 9-inch baking pan.
• Melt 1 cup of the chocolate chips in a small saucepan over low heat, let cool slightly- (Or place the chips in a bowl and microwave on HIGH, stirring every 30 seconds, until melted, about 2 minutes.) Set aside.
• Sift together the flour and baking powder and set aside.
• In a large bowl, beat the butter and the brown sugar until light and fluffy.
• Beat in the eggs, one at a time, beating thoroughly after each addition.
• Add in the vanilla.
• Stir in the sifted dry ingredients until blended.
• Transfer half of the mixture to another bowl.
• Stir melted chocolate into one portion until blended.
• Spread chocolate batter in the prepared pan.
• Drop remaining batter by tablespoonfuls onto the chocolate batter.
• Spread carefully into an even layer.
• Sprinkle with remaining 1/2 cup chocolate chips and the walnuts.
• Bake on the center rack for 30 minutes, or until the edges begin to pull from the sides of the pan.
• Cool in the pan on a wire rack before cutting into bars.