
Added by Lars Viken
Inspired by Smitten Kitchen, this rhubarb cake layers a buttery sour cream base with tart rhubarb and a crunchy oat-almond crumble topping. For a simpler version, skip the cake base and bake just the rhubarb with the crumble as a fruit crisp. Best served warm with vanilla ice cream or whipped cream.
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Preheat the oven to 175°C (350°F) with conventional heat. Prepare a 27-28 cm round cake pan or a 20 x 30 cm baking dish. Line with parchment paper.
Stir together the rhubarb, lemon juice, and sugar in a medium bowl. Set aside.
Measure out all the crumble ingredients into a small bowl. Use your hands to mix until the butter is evenly distributed. Set aside.
Beat the butter, sugar, and lemon zest until light and fluffy. Add one egg at a time, scraping down the sides with a spatula between each addition.
Measure the dry ingredients into a small bowl and mix together: flour, baking powder, salt, and ground ginger.
Add the sour cream and half of the dry ingredients to the butter mixture. Fold together gently — do not overmix. Add the remaining dry ingredients.
Spread the thick batter into the cake pan in a thin layer.
Cover the batter with the rhubarb pieces in a thin but dense layer.
Crumble the crumble topping over the rhubarb.
Bake in the center of the oven for about 60 minutes before checking. The cake should be golden on top, and a skewer inserted in the center should come out clean.
Cool the cake in the pan.
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