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Fluffy rhubarb cake

It is a delicate and fluffy cake with a delicious rhubarb filling. The cake is wonderful! Very moist and so fruity. Although it is quite a big cake, it all disappeared in one afternoon, thanks to my family. You will want to make it over and over again!

Ingredients for the fluffy rhubarb cake:

  • 5 large eggs
  • 3/4 cup caster sugar
  • 120 ml rapeseed or sunflower oil
  • 50 ml milk
  • 250 g plain flour
  • 1 tsp baking powder

All ingredients should be at room temperature.

Add the eggs (don’t separate into egg whites and egg yolks) and sugar in a mixing bowl. Beat until thick and fluffy – the mixture should increase in volume almost three times. Pour in oil, then slowly the milk, beating. Directly into the mixture, sift in the flour and baking powder and mix using a spatula.

Line a 24 x 34 cm cake tin with baking paper. Pour half of the batter into the tin and level out. Bake at 175°C for about 15 minutes or until light brown. Check if the cake is ready – it should be almost baked but not raw. Remove from the oven and add the rhubarb filling on top (recipe below), align. Pour the rest of the batter over the filling and level out. Bake another 30 minutes at 175°C or until a stick inserted into the cake comes out dry.

Remove from the oven and cool completely. Then, pour the icing on the cake and cut into squares.

Rhubarb filling:

  • 900 g rhubarb cut into 2 cm cubes (don’t peel the rhubarb)
  • 200 g strawberries, cut into smaller pieces
  • 165 g (3/4 cup) caster sugar, or a little less
  • juice from half a small lemon
  • 1/3 cup potato starch

Add the rhubarb, strawberries, sugar, and lemon juice in a pot. Bring to a boil and cook for a few minutes to slightly soften the rhubarb (however, don’t overcook it; the rhubarb shouldn’t fall apart).

Mix the potato starch with a few tablespoons of cold water in a cup. Add to the soft rhubarb filling, mix, and bring to a boil. It should have the consistency of custard. Remove from the hob, and cool.


  • 1 cup icing sugar
  • 3 Tbsp boiling water

Mix the icing sugar with the water using the back of a spoon. If the icing is too thick, add more water, and if the icing is too thin, add more icing sugar.


Fluffy rhubarb cake
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