Easy Rhubarb Cake

Name: Easy Rhubarb Cake
Prep time: 15 min
Cook time: 45 min
Total time: 60 min
Ingredients: 240 g plain (all-purpose) flour (sieved); 220 g vanilla sugar or regular caster (fine) sugar; 125 ml rapeseed/sunflower/olive oil; 1 tsp baking powder; 0.5 tsp baking soda; 1 Tbsp cinnamon (or to taste); 500 g rhubarb (cleaned and sliced into small chunks); 4 large eggs (in room temperature); icing sugar (to serve)