Pre-heat oven to slow (150 degrees celsius, fan-forced).
Grease and line a round cake tin (approx 9 ½ inches diameter).
Beat butter, sugar and egg yolks on med-high in a stand mixer until mixture reaches a pale colour.
Sift flour and baking powder together 3 times.
Add the flour, milk and sour cream and the cherries, alternately to the butter/sugar/egg yolk mixture, stirring to combine.
Beat egg whites until soft peaks form. Fold into cake mixture.
Pour mixture into prepared cake tin and decorate the top with blanched almonds. Cook in a slow oven for 50-60 minutes.
Allow to cool.
Dust with a little icing sugar and add a few extra cherries to the top of the cake before serving with pouring custard.
Pouring custard
Whisk together egg yolks, sugar and custard powder in a large bowl.
Combine milk, cream and vanilla extract in a saucepan and bring to the boil.
Spoon some of the hot milk/cream mixture over the yolk/sugar/custard power mixture, whisking to combine. Slowly add all of the hot milk/cream mixture, whisking to combine.
Pour all the mixture back into the sauce pan and bring to a simmer. Simmer for a couple of minutes or until mixture starts to thicken.
Serve the cake with warm or cold pouring custard.
Notes
Storing: Store cake in a cool, dry place for up to 3 days – though it's definitely best eaten within 24 hours.Freezing: Wrap well and freeze for up to 3 months.Nutrition: The nutrition information is an automatically generated estimate and is not guaranteed to be accurate.