Preheat the oven to 350°F/ 180°C. Grease and line the cake tin with parchment.
In a bowl, fitted with a paddle attachment on a stand mixer. Add and cream the butter and sugar (for about 5 minutes)until pale and fluffy.
Add and beat one egg at a time. Add in the mashed bananas.
Sift the dry ingredients (baking powder +AP flour) into the bowl. Add the spices and mix thoroughly until all the ingredients are incorporated.
Fold in the chopped nuts into the batter. Pour the batter into the prepared baking tin.
Bake for 35-40 mins or until its golden and springy to touch. Remove from oven and let it cool on a cooling rack.
In a bowl, fitted with a whisk attachment on a stand mixer. Add the heavy cream into the bowl and whip till soft peaks are formed.
Add the maple syrup and maple sugar. Whisk till stiff peaks are formed. Keep in refrigerator until ready to use.
Add dollops of maple whipped cream on the spiced banana cake. Drizzle maple syrup on the cream before serving the cake.