Preheat oven to 375 degrees
Grab a baking sheet and put parchment paper on sheet
Add 1/2 cup butter to a microwave safe bowl and heat for 30 seconds
Add 2/3 cup brown sugar to bowl and stir together
Add 2 teaspoon baking powder to bowl
Add 1/2 teaspoon salt to bowl and stir
Add 1 egg to bowl
Add 1 teaspoon vanilla to bowl and mix together
Add 1 cup flour to bowl and mix
Add 3/4 cup chocolate chips to bowl and fold batter over
Transfer your batter to baking sheet and spread it on pan
Cook for 15-18 minutes or until brown
Take out of oven and allow to cool
Once cool take a pizza cutter and slice cookie into thin slices