Peel the pears, taking care not to remove the stem. Remove the core from the underside with an apple cutter. Put lemon juice in a saucepan, pour in enough water to cover the pears. Bring to a boil. Steam the pears in it for 5 minutes over a medium heat.
Break the chocolate into small pieces and melt it with butter in a saucepan over low heat. Separate eggs. Beat the egg whites until stiff, sprinkling in 30 g of sugar. Whip the egg yolks with 30 g of sugar until they are creamy white. First stir in chocolate, then almonds and baking powder. Fold in the egg whites.
Preheat the oven to 160 ° (circulating air 140 degrees). Grease 4 150 ml molds with butter and spread the chocolate mixture on top. Place a pear in the middle of each. Bake on the middle rack for about 35 minutes.
Whip the cream until semi-stiff. Crush the allspice in a mortar, stir into the cream with the vanilla sugar. Dust the cakes with icing sugar as desired and serve with allspice cream while still warm.