Chocolate Chip Peanut Butter Blondies

1 cup margarine
2 cups white sugar
2 eggs
1 teaspoon vanilla extract
1 cup chunky peanut butter
2 cups all-purpose flour
1 teaspoon baking powder
2 cups semisweet chocolate chips

1. Preheat oven to 350 degrees F (175 degrees C). Line a 10x15 inch jellyroll pan with parchment paper.
2. In a medium bowl, cream together the margarine and sugar. Beat in the eggs, one at a time. Stir in the vanilla and peanut butter until smooth. Combine the flour and baking powder, then stir into the peanut butter mixture. Finally, fold in the chocolate chips. Spread the dough out flat on the prepared pan.
3. Bake for 12 to 15 minutes in the preheated oven, until the tops of the bars look dry. Cool in pan, then cut into squares.