Coffee cake with blueberries

Name: Coffee cake with blueberries
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Cuisine: American
Ingredients: 2 ½ cups all-purpose flour, divided (334 g); ½ teaspoon of salt; 2 and a half teaspoons of baking powder; ¼ teaspoon of baking soda; 1 cup of granulated sugar (222 g); 1 cup of sour cream (8 ounces); 1 teaspoon of vanilla extract; ¼ cup of milk (2 oz); 2 large eggs; ½ cup unsalted butter, melted and cooled (4oz or 113g); 2 cups fresh, rinsed and dried blueberries (10 ounces or 290 g); 4 tablespoons unsalted butter, melted (56g or 2oz); ¾ cup of all-purpose flour (96g); 1 tsp ground cinnamon; ¼ cup of granulated sugar (55 g); pinch of salt