2 cups all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
1 teaspoon salt
2 sticks butter, softened
1 cup brown sugar, packed
1 cup granulated sugar
1 teaspoon vanilla extract
2 eggs
1 18-ounce jar peanut butter, creamy or chunky
Preheat oven to 350 degrees. In a large bowl, combine butter, both sugars, vanilla extract, and eggs. Blend until smooth, then add peanut butter, and continue beating until smooth.
In a separate bowl, combine flour, baking powder, baking soda, and salt. Add this to the peanut butter mixture and blend well. Place by tablespoon full onto greased cookie sheet, placing about 2 inches apart. Bake for about 10 minutes, or till cookies just start to brown around the edges.