1.Preheat oven to 180°C. Line two oven trays with baking paper.
2.In a small bowl, beat butter, extract, sugar and almonds with electric mixer until light and fluffy. Add egg, beat until just combined; stir in sifted flour.
3.Drop level tablespoons of mixture onto trays 5cm apart. Use handle of a wooden spoon to make a small hole about 1cm deep in the top of each biscuit. Fill holes with ¼ teaspoon jam.
4.Bake biscuits about 15 minutes; cool on trays.