Preheat the oven to 425°F.
Line a muffin pan with paper liners.
In a medium bowl, blend together the flour, cocoa, sugar, baking powder, salt, cinnamon, and softened butter with either the back of a fork or a pastry blender. Set aside.
2 ½ cups all-purpose flour, ¼ cup Hershey’s cocoa powder, ¾ cup brown sugar, 1 tablespoon baking powder, ¾ teaspoon salt, 1 teaspoon ground cinnamon, 6 tablespoons butter
Mash the bananas and place in large mixing bowl.
3 ripe bananas
Add the eggs to the mixing bowl one at a time, beating after each one. Then add the milk and vanilla. Mix all ingredients until combined well.
2 eggs, ⅓ cup milk, 1 teaspoon vanilla extract
Slowly blend the dry ingredients with the banana mixture just until mixed completely. Do not over mix.
Add in the chocolate chips. Mix in for only about 5 seconds.
1 cup semisweet chocolate chips
Gently fold in the raspberries with a spatula.
1 ½ cup fresh raspberries
Fill up each muffin liner to the top.
Bake at 425°F for minutes for 5 minutes.
While muffins are still in the oven, reduce the temperature to 375°F and bake for an additional 13-14 minutes.
Cool before serving.