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Preheat the oven to 350.
Gather all ingredients.
Melt butter in a microwave safe bowl.
Cream butter and brown sugar.
Add in flour, salt, baking soda, and baking powder.
Mix until all is combined and smooth.
Grease a 9x13 pan.
Pour batter into pan.
Add chocolate chips.
Bake for approximately 18 minutes.
Let cool before cutting.