Mix together 40g butter and 60g brown sugar, then divide between 4 ramekins. Top with the pears.
Beat together the remaining butter and sugar in a bowl, until the mixture is pale and fluffy. Add the egg and mix to combine. Sift in the flour and mix until you have a smooth pudding batter.
Spoon the batter into the ramekins and cook in the microwave for 2½ minutes until risen and cooked through. Set aside to cool for 1 minute.
Dust the puddings with the icing sugar and cinnamon and serve immediately.