Peanut Butter Cookies

1 cup (2 cubes) unsalted real butter, softened
1 cup chunky peanut butter
1 cup lightly packed brown sugar
3/4 cup granulated sugar
2 large eggs
1 tsp. baking soda
1/2 tsp. baking powder
1/4 tsp. salt
2-1/2 cups flour

In large mixer, combine butter with peanut butter, brown sugar and granulated sugar.  Add eggs.  Mix well.  Add dry ingredients and mix well.  Preheat oven to 375 degrees.  Roll dough into balls.  Put on cookie sheet and use a fork to press a criss-cross pattern into the top of each cookie.  (You could sprinkle the tops with some sanding sugar at this point, but it is not necessary.)  Bake for 10-11 min.