Start with the crumble, as it needs to cool down. In a medium-sized bowl, combine all-purpose flour (80g), ground almonds, oats, brown sugar (80g), and optionally a pinch of cardamom. Mix the dry ingredients with a fork to combine them evenly.
Description
This is not just an ordinary rhubarb cake. It is a festive, incredibly aromatic version that will delight any lover of homemade baked goods. The base is a moist, dense, and buttery sponge cake, infused with the intense flavor of fresh lemon – both from the zest and the juice. Inside, there is a layer of slightly caramelized rhubarb with a hint of warming ginger, which cuts through the sweetness and adds a touch of spiciness. The whole is topped with a crunchy, golden crumble made with oats and ground almonds, which gives the cake a wonderful texture. It is the perfect combination of sour, sweet, and buttery flavors. The cake is excellent for a spring afternoon tea, a garden party, or as a sweet finale to a family dinner. Served slightly warm with a scoop of vanilla ice cream, it becomes a dessert worthy of the finest patisserie.
Składniki (15)
- Mąka pszenna tortowa (typ 450) 330 g
- Butter 260 g
- Cukier biały drobny 180 g
- Eggs 3 szt.
- Sour cream 18% 120 g
- Lemon 1.9 szt.
- Baking powder 10 g
- Rhubarb 400 g
- Brown sugar 110 g
- Fresh ginger 10 g
- Mountain oats 50 g
- Ground almonds 50 g
- 🌿 Przyprawy
- Salt 0.0 szczypt
- ✨ Opcjonalne
- Ground cardamom 1 g
- Powdered sugar 100 g
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Preparation steps
Preparing the crumble
Take the very cold butter (80g) out of the fridge. Cut it into small cubes (about 1x1 cm) and add it to the dry ingredients. Now for the most important part: using your fingertips, quickly rub the butter into the dry ingredients, lifting the mixture up and letting it fall. Do this until clumps resembling wet sand with larger crumbs form. Do not knead the dough into a ball! Place the finished crumble in the fridge for at least 30 minutes.
Preparing rhubarb
Thoroughly wash and dry the rhubarb stalks. Cut off the leaves (they are toxic!) and the woody ends. Cut the rhubarb into cubes about 1.5 cm thick. Peel the ginger and grate it on a fine grater. In a medium skillet, place the chopped rhubarb, brown sugar (30g), and grated ginger. Heat over medium heat for 3-4 minutes, stirring occasionally, until the rhubarb softens slightly and releases juice, and the sugar dissolves. Do not cook it into jam! Remove from heat and set aside to cool completely.
Preparing the dough
Preheat the oven to 180°C (fan) or 190°C (top-bottom). Prepare a 24 cm round cake pan. Line the bottom of the pan with parchment paper, and grease the sides with butter and dust with flour. In a separate bowl, mix the all-purpose flour (250g), baking powder, and salt. Thoroughly scrub the lemon and pour boiling water over it. Grate the entire yellow zest (avoiding the white, bitter part) and squeeze out the juice (you will need about 3 tablespoons).
In a large mixing bowl, place the softened butter (180g) and white sugar. Use the paddle attachment. Beat on medium speed for 6-8 minutes. The mixture should become very light, almost white, and fluffy. This is the most important step for the texture of the cake! Scrape the mixture from the sides of the bowl halfway through mixing. Then add the grated lemon zest and mix briefly.
Reduce the mixer speed to the minimum. Add the eggs one by one, waiting for the previous one to completely combine with the mixture. If the mixture starts to curdle (looks like sour milk), don't worry - add a tablespoon of the flour you prepared earlier, it will save it. After adding all the eggs, mix for another minute.
Now you will add the dry and wet ingredients alternately. To the butter mixture, add 1/3 of the flour mixture and mix on the lowest speed just until combined. Then add half of the sour cream mixed with 3 tablespoons of lemon juice and mix briefly again. Repeat: add the second 1/3 of the flour, the remaining sour cream with lemon juice, and finally the last portion of flour. Mix each time only until the ingredients are combined.
Assembling and baking the cake
Transfer about 2/3 of the batter to the prepared springform pan and smooth the surface with a spatula. Evenly distribute the cooled rhubarb along with the juice it released on top of the batter. Cover the rhubarb with the remaining 1/3 of the batter, gently spreading it out. Evenly sprinkle the chilled crumble from the refrigerator on top.
Place the cake in the preheated oven and bake for 50-60 minutes. After about 40 minutes, check the cake - if the crumble is browning too quickly, loosely cover the top with aluminum foil. To check if the cake is done, insert a wooden skewer into the center. If it comes out dry (without raw batter), the cake is baked. Remove from the oven and let it sit in the pan for 15 minutes, then carefully remove the ring and transfer to a wire rack to cool completely.
Decoration (optional)
If you want, you can prepare the icing. In a small bowl, place the powdered sugar and gradually add lemon juice, half a teaspoon at a time, vigorously mixing with a fork or a small whisk. Add the juice until you achieve a thick but still pourable icing. Drizzle over the cooled cake, creating irregular swirls. Leave for 15 minutes to let the icing set.
Fun Fact
Rhubarb, although treated as a fruit in the kitchen, is botanically a vegetable. In 1947, a court in New York officially recognized it as a fruit to lower import duties, which were lower for fruits than for vegetables.
Best for
Tips
The cake is delicious on its own, but served slightly warm with a scoop of vanilla or cream ice cream, it reaches the level of a restaurant dessert. It also pairs wonderfully with a dollop of thick Greek yogurt or crème fraîche, which will balance its sweetness. You can garnish it with fresh mint or lemon balm leaves.
Store the cake in an airtight container at room temperature for up to 3 days. In the refrigerator, it will stay fresh for up to 5 days, but the crumble may soften slightly due to moisture. To restore its crunchiness, you can reheat a piece of cake in an oven preheated to 150°C for 5-7 minutes.
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