Preheat oven to 350F and generously grease a 9 x 9 baking dish with non-stick cooking spray.

In a large microwave safe bowl, melt butter and chocolate chips in 30 second increments, stirring between each 30 seconds, until melted and smooth.

Whisk in brown sugar, eggs, and Dr Pepper until combined.

Sift in Flour, cocoa, and salt. Stir until smooth.

Pour batter into the prepared baking dish. Bake for 25-30 minutes, or until set.

Allow to cool before slicing and serving.

ENJOY!