Add oats to blender and blend for ~1 minute, until finely ground into a powder. Add banana, milk, nut butter, salt, cocoa powder, baking powder and blend until smooth.
Split batter evenly between 2 ramekins, reserving 1/4 cup batter for topping. Dot batter with chocolate chunks, and put 1/2 tbsp of jam in the center of both ramekins. Cover with remaining batter and additional chocolate chips.
Bake for 30-35 minutes. Let cool for 3-5 minutes and enjoy warm.