Peanut Chocolate Swirl Bars

I'm posting this in response to a request. The original recipe came from LAND O LAKES. Pretty decadent. Enjoy!

• Ready In: 40 mins
• Yields: 36 cookie bars

Ingredients

• 1⁄2 cup margarine
• 1 1⁄2 cups brown sugar (packed)
• 2  eggs
• 2  teaspoons vanilla
• 1 1⁄2 cups all-purpose flour
• 2  teaspoons baking powder
• 1⁄2 teaspoon salt
• 1  cup  semi-sweet chocolate chips
• 1  cup salted peanuts, chopped

Directions

1. Preheat oven to 350-degrees F.
2. Melt margarine in a 3-quart saucepan over medium heat (3-5 minutes). Remove from heat.
3. Beat the eggs in a small bowl and "temper" them (continue beating) with some of the slightly cooled, (but still melted), margarine to avoid scrambling the eggs. Pour the egg-margarine mixture back into the saucepan and add the sugar and vanilla.
4. After blending the previous ingredients, add the flour, baking powder and salt. Mix well.
5. Gently stir in the chocolate chips and the peanuts.
6. Spread the mixture into an ungreased 9" x 13" baking pan. Bake for 20-25 minutes, (do not overbake).
7. Allow to cool completely and then cut into bars.