1 cup (16 tablespoons) butter, softened to room temperature
2 cups smooth or chunky peanut butter
1 ½ cups firmly packed light brown sugar
1 cup granulated sugar
2 large eggs
1 ½ tablespoons milk
1 ½ teaspoons pure vanilla extract
2 ½ cups all-purpose flour
1 ½ teaspoons baking soda
1 teaspoon baking powder
½ teaspoon salt
2 cups chocolate chips (or a combination of peanut butter and chocolate chips)