Heat oven to 180C/160C fan/gas 4. Grease a 20 x 30cm baking or roasting tin and line with baking parchment. To make the sponge batter, beat the butter, flour, sugar, baking powder, eggs, yogurt, vanilla and almond extract in a large bowl with an electric whisk until lump-free. Spoon into the tin and bake for 10 mins.
Quickly dot over the jam, scatter over the almonds, then bake for 15-20 mins more until golden and risen and a skewer poked in comes out clean. Cool in the tin, then dust with icing sugar.