Measure and sift into a bowl the flour, baking powder, bi -carb and spices
With an electric mixer beat butter and sugars well. Turn mixer on low and add vanilla, then at one egg at a time to the mix until combined.
With the mixer on low fold in 1/3 of the sifted flour, alternating with milk, flour, milk, flour until all combined then turn the mixer up to 3/4 speed for 30 seconds or so.
Mash bananas on a plate then fold into the batter with a spoon until combined.
Pour batter evenly into 2 lined loaf tins (approx 12 x 22cm). Pop pans into a pre heated 175*C oven for approx 30 mins checking with a skewer that the cake is cooked.
Cool for 5 mins in the pans then turn out onto a wire rack to cool fully.