Preheat oven to 375°F. Place paper muffin liners in a muffin pan.
Stir together flour, baking soda, salt and baking powder in a large bowl.
In medium bowl, mix banana, raspberries, milk and vanilla.
In a large bowl, cream together butter, sugar and egg with a mixer until light and fluffy.
Add ⅓ of dry mixture to butter sugar mixture and stir to combine. Add ⅓ of banana mixture to butter sugar mixture and stir to combine. Repeat until all the mixtures have been combined.
Place a scoop of the batter in muffin pan. Add 1 tsp raspberry jam in center of each. Add more batter on top.
Bake for 20 minutes. Let cool slightly before serving.
Notes
You could use mashed strawberries or mashed blueberries in place of the raspberries. You can also change the jam flavor if you prefer.