Preheat your oven to 350°F (175°C). In a large mixing bowl, whisk together the dry ingredients: flour, baking powder, and salt.
In another bowl, combine the egg, milk, melted butter, and sugar. Add the wet ingredients to the dry ingredients and mix until just barely incorporated; it's okay if there are a few streaks of flour.
Gently fold in the quartered cranberries and chocolate chunks until evenly distributed throughout the batter. Transfer the batter to the loaf pan, spreading it evenly.
In a bowl, combine brown sugar, cinnamon, flour and cut in cold butter until it is a crumbly mixture. Sprinkle the brown sugar crumble on top of the batter.
Bake in the preheated oven for approximately 60 minutes, or until a toothpick inserted into the center comes out clean.
Allow the chocolate chip cranberry bread to cool in the pan for about 15 minutes before slicing. Enjoy!