adapted from allrecipes.com
1 cup butter, melted
2 cups brown sugar
2 2/3 cups all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
1 teaspoon vanilla
2 cups semisweet chocolate chips
1. Preheat the oven to 375 degrees F.
2. In a medium bowl, stir together the melted butter and brown sugar until smooth. Beat in the eggs one at a time. Add the vanilla. Combine the flour, baking powder and baking soda, gradually stir into the sugar mixture. Fold in the chocolate chips. Drop by rounded spoonfuls onto the prepared cookie sheets.
3. Bake for 8 to 10 minutes in the preheated oven. Allow cookies to cool on baking sheet for 5 minutes before removing to a wire rack to cool completely.
Note: I use a whisk to mix together first the butter, sugar, and eggs, and it really helps make that batter nice and smooth. I also use it when I add the dry ingredients but after that, just a wooden spoon is needed. I think you can make the batter in about six minutes, tops.