3cupschocolate chipsor any combination of chips you like
Instructions
Preheat oven to 350 degrees.
Add butter and sugars to mixing bowl with paddle attachment cream together ingredients until fluffy. About 3 minutes.
Add vanilla. Add eggs one at a time, being sure to mix well after each. Scrape down sides of bowl.
In separate bowl combine flour, baking powder, baking soda, and salt. Gradually add flour to butter/sugar mixture.
Fold in chocolate chips, scrape sides of bowl, and continue to mix for 30 seconds or so.
Using a large spatula dollop cookie dough on to baking sheet, using spatula spread dough evenly until it completely covers baking sheet. Dough will be spread thin, and there may be a hole or two, that's OK when cookie bars bake they will rise and fill in the empty spots. Bake at 350 degrees for 20 minutes, until just barely brown.