- Preheat oven to 350°F and grease a 9×9-inch baking pan with nonstick spray.
- In a medium bowl, stir together melted butter, brown sugar, vanilla, and egg until well combined.
- Add flour, baking powder, salt, and baking soda and stir to combine.
- Stir in chocolate chips and pour into prepared pan. Bake 20-25 minutes. Enjoy!
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