Pre-heat your oven to 180C / 350F
Line a Springform tin with parchment paper and butter the sides
In a large bowl, cream the butter and 120g sugar and slowly add in egg yolks, mix on high speed till pale yellow.
Add both flours slowly, bit by bit and mix on medium speed.
Add crushed cardamom, baking powder, salt and milk and mix on medium speed.
In a separate bowl, whisk egg whites till soft peaks begin to form, around 5 minutes on high speed.
Slowly fold egg whites into the batter. Transfer into Springform.
Place in oven for 35 minutes- since oven times vary keep an eye on the cake at the 30 minute mark- if it looks golden, it is ready. Insert toothpick to verify.
Sprinkle with flaked almonds till the surface of the cake is completely covered. Dust liberally with confectioner's sugar using a sieve.