1/2 c. crunchy peanut butter
1/3 c. butter
3/4 c. brown sugar
3/4 c. white sugar
2 eggs
2 tsp. vanilla
1 c. flour
1 tsp. baking powder
1/4 tsp. salt
1 1/2 c. chocolate chips

Combine peanut butter, butter, brown sugar and white sugar. Beat until creamy. Beat in eggs and vanilla. Combine in bowl flour, baking powder and salt; blend into butter mixture.

Spread in 9x13 inch pan. Sprinkle 1 1/2 cups chocolate chips on top. Put in oven for 5 minutes (350 degrees). Remove and run knife through to marbelized; return to oven for 30 minutes. Cool.