Double Chip Peanut Butter Blondies

I first made these as Valentine gifts for friends in 2004.  I had so much faith in the delicious looking recipe that I gave them out without first trying them.  So, the feedback I received was unexpected: people were blown away by these peanut butter chocolate treats.  I have been making them ever since.

And, now, you can, too!  These are like very soft bar cookies.  They are very easy to make in about 15 minutes. 

I found the recipe in a small cookbook published by the Southern Living cooking school in 2001. 

Ingredients
1 cup butter, softened
1 cup firmly packed dark brown sugar
1 cup sugar
1/2 cup creamy peanut butter
2 tsp vanilla extract
2 large eggs
2 1/4 cups all purpose flour
1/2 tsp baking powder
1/2 tsp baking soda
1/4 tsp salt
1 12oz package semi-sweet chocolate chips
1/2 cup peanut butter chips

Beat butter at medium speed with an electric mixer until creamy.  Gradually add sugars, beating until smooth.  Add peanut butter and vanilla, beating until blended.  Add eggs, 1 at a time, beating after each addition.
Combine flour and next 3 ingredients.  Gradually add to butter mixture, beating on low speed until blended.  Fold in chocolate chips and peanut butter chips. 
Press dough into a greased and floured 13x9" pan. 
Bake at 350 degrees for 35 to 40 minutes.  Cool completely in pan on wire rack.  Cut into bars and serve.  Makes 2 dozen.