Heat oven to 190C/170C fan/gas 5. Grease and flour 2 x 20cm sandwich tins. Place the butter, sugar and half the pot of maple syrup and honeyed whiskey into a bowl and beat well to a creamy consistency. Slowly beat in the eggs, one by one, then fold in the flour and mix well.
Divide the mix between the cake tins, place into the oven and bake for about 20 mins until risen and golden brown. The cakes should spring back when gently pushed in the middle. When ready, remove from the oven and allow to cool for 5 mins in the tin, before turning out onto a wire rack and cooling completely.
Mix the reminder of the pot of maple syrup with the cream. Whisk until you get a matt finish.
Spread the jam (optional) onto one cake and top with the mixed cream. Sandwich the cakes together and dust with icing sugar.