Classic Peanut Butter Cookies

1 cup unsalted butter, softened
1 cup crunchy peanut butter
1 cup granulated sugar
1 cup light brown sugar, firmly packed
2 eggs
2 1/2 cups all-purpose flour
1 teaspoon baking powder
1 1/2 teaspoons baking soda
1/2 teaspoon salt

Cream together butter, peanut butter and sugars. Beat in eggs. In a separate bowl, sift together flour, baking powder, baking soda, and salt. Stir into batter. Put batter in refrigerator for 1 hour. Roll into 1" balls and put on baking sheets. Flatten each ball with a fork, making a criss-cross pattern. Bake in a preheated 375°F oven for about 10 minutes or until cookies begin to brown. Do not over-bake. Makes 4 dozen cookies.