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Preheat oven to 350°F. Grease a 9"x 5" loaf pan with cooking spray, and set aside.
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Mix the together the dry ingredients: flour, sugar, brown sugar, baking powder, salt, and cinnamon.
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In a separate bowl, whisk together the melted butter, egg, milk, and vanilla. Gradually pour the wet mixture into the flour mixture, stirring until combined. Fold in the chocolate chips and the blueberries. Transfer the batter to the prepared pan, and spread evenly.