Line a 9×5 loaf pan with parchment paper(or grease it really well with butter) and set aside until ready to use.
Preheat the oven to 350 degrees F.
In a large bowl, combine the wet ingredients for the cake(eggs, sour cream, melted butter, and vanilla extract). And whisk to combine.
In a medium bowl, combine the dry ingredients(flour, baking powder, salt, and ground cardamom). and stir.
Add 1/3 of the flour mixture to the bowl ingredients and fold to combine. Repeat with the remaining flour 2/3 of the flour mixture, and fold just until combined.
Spoon the cake batter into your prepared loaf pan, doing you best to keep it as evenly spread out as possible.
Place the cake into your preheated oven and bake for 50-60 minutes. Or until a toothpick inserted into the center of the cake comes out clean. Remove the cake from the oven and allow it to cool for 10 minutes before transferring the cake to a wire rack. Allow the cake to cool completely before cutting and filling.
Once the cake is completely cooled, use a sharp serrated knife to slice it in half lengthways. Spread your jam of choice over the bottom half of the cake, leaving a 1/2 inch gap around the edges of the cake. Spoon the whipped cream over the top of the jam and gently spread it out, doing your best to keep it in an even layer.
Carefully place the top of the cake on top of the whipped cream. And dust the finished cake with powdered sugar.
Slice carefully and serve.
Enjoy!