In a large mixing bowl, beat Butter (125 gram) and Brown Sugar (1 1/4 cup) together with an electric mixer. Add Egg (2) and beat one at a time. Finally, beat in Banana (1 cup).
Add Self-Rising Flour (2 cup), Baking Powder (1 teaspoon), and Ground Cinnamon (1 teaspoon). Beat together. Stir in Milk (1/2 cup), fold in frozen Fresh Raspberries (1/2 cup).
Grease and line with non-stick baking paper a standard loaf pan. Spoon the batter into the tin. Cook at 180 degrees C (350 degrees F) for 45 minutes or until a pick in the middle comes out clean.
Let cool in the tin for 15 minutes before transferring onto a wire rack to cool completely.