Mix the flour and baking powder in a bowl, mix in the blueberries. Combine the sugar with the oil, eggs and vanilla paste, mix in the bananas. Add to the flour, mix well using the dough hook on a hand mixer. Transfer the cake mixture to the prepared tin, smooth down.
Approx. 30 mins. in the centre of an oven preheated to 180°C. Insert a wooden skewer to check whether the cake is cooked through.