2 c. white sugar
2 c. brown sugar (light)
1 stick butter
1 c. evaporated milk
1 c. peanut butter (smooth)
1 (7 oz.) jar marshmallow cream
2 tsp. vanilla
1 c. crushed pecans

Microwave first four ingredients on high for 13 minutes, stirring every 4 minutes. Add remaining ingredients and stir well. Pour into buttered 9 x 13 pan.