This plum kuchen is essentially an easy crumb cake made with a doughy batter and a simple streusel topping. A German classic, we welcome it as breakfast, brunch, onesies, dessert, midnight nosh…heck, there’s no time of day or night that we don’t welcome it.
For the cake
- 9 tablespoons (4 1/2 oz) unsalted butter, diced and softened, plus more for the pan
- 1/2 cup whole milk
- 2 1/2 cups all-purpose flour
- 2/3 cup granulated sugar
- 1/2 teaspoon ground cinnamon
- 1/4 ounce fast-acting dried yeast
- A good pinch salt
- 1/3 cup sour cream or buttermilk, at room temperature
- 1 medium egg
- 1 medium egg yolk
- 1 teaspoon finely grated lemon zest preferably organic
- 1 teaspoon vanilla extract
- 1 1/4 pounds plums, rinsed and sliced into sixths or eighths (about 4 plums)
For the streusel
- 1/4 cup light brown sugar
- 1/4 cup dark or light brown sugar
- A good pinch salt
- 1/2 teaspoon ground cinnamon
- 2/3 cup all-purpose flour
- 4 tablespoons (2 oz) unsalted butter, melted
Make the cake dough
- Butter an 8-inch (20-cm) square cake pan and line the bottom and sides with buttered parchment paper, allowing the parchment to hang over the sides of the pan.
- Warm the milk in a small saucepan over low heat until 110°F (43°C) or a shade warmer than body temperature. Do not let the milk even come close to boiling.
- Put the flour in the bowl of a stand mixer fitted with a dough hook. Add the granulated sugar, cinnamon, yeast, and salt and mix with a balloon whisk to thoroughly combine. Make a well in the middle.
- In a bowl or large measuring glass, combine the sour cream or buttermilk, whole egg, yolk, lemon zest, and vanilla extract. Pour the warm milk into the mixer bowl, add the sour cream mixture and softened butter, and knead on medium speed for 4 to 6 minutes, until you have a smooth dough that's almost sorta like a thick cake batter.
- Scoop the dough into the prepared pan and spread level using a palette knife. Cover loosely with plastic wrap and either let the dough rise slowly overnight in the fridge or for 2 to 3 hours at room temperature.
☞TESTER TIP: The dough may not rise appreciably. On the other hand, it may double in size. Either way is okay.
- If you left the dough overnight in the fridge, bring it to room temperature before proceeding.
Make the streusel
- Mix the sugars, salt, cinnamon, and flour in a small bowl. Add the melted butter and stir well to combine—the mixture should start to form large clumps.
Assemble and bake the kuchen
- Preheat the oven to 375ºF (190°C).
- Scatter 1/3 of the streusel over the cake. Arrange the plum slices on the streusel. Scatter the remaining streusel over the plums.
- Place the pan containing the kuchen on a rimmed baking sheet lined with aluminum foil. Bake for 20 minutes. The dough will probably have puffed to the top of the pan.
- Reduce the heat to 350ºF (177°C) and continue to bake until the cake has risen even more, the streusel is golden and crisp, the fruit is tender, and a tester inserted in the center of the cake comes out clean, 40 to 50 minutes more.
- Let the kuchen cool in the pan until warm or room temperature before slicing. It’s best eaten on the day of making but will reheat well if wrapped in foil and placed in a warm oven for a few minutes.
Recipe Testers’ Reviews
Delicious kuchen that’s wonderful anytime of the day—for breakfast, with afternoon tea, or as an after-dinner dessert! It’s not overly sweet, which is always a good thing when you want seasonal fruit to be the star.
The dough is easy to mix, and I love that it rises only once right in the baking pan.
It’s true that this kuchen is best if enjoyed the day it is baked. It was slightly drier the next day when kept at room temperature, and refrigeration made it stiffer. So do take advantage of the reheating instructions if you have some left over.
I bet this cake would be just as good made with other summer fruit such as peaches, apricots, and sour cherries. It’s not yet the plum season where I live, but plumcots were available.
The sweetness of the streusel wasn’t too much, but the flavor of the dark brown sugar was a bit too deep and heavy for the fresh fruit. I would use all light brown sugar next time.
This plum kuchen is an easy yet delicious version of a German crumb cake. The addition of plums results in a tart, juicy cake worthy of breakfast, brunch, or even dessert.
I planned for this to be a breakfast treat, along with a good strong cup of coffee. I prepared my dough the night before and let it rise in the refrigerator as directed. While mixing the wet into dry ingredients, it took more than the 4 minutes suggested time to thoroughly mix it into a dough. It looked more like a very thick cake batter. It was spread evenly into a buttered, parchment lined baking pan.
Personally, I feel an 8-inch square pan is way too small for this recipe. My 9-by-13-inch baking dish was the perfect size. I loosely covered the dough with plastic wrap and popped it in the fridge for the overnight rising. The next morning, the dough was firm and had risen some but not a very noticeable amount.
I prepared the streusel topping while allowing the dough to come to room temp. I cut the plums into eighths. They were very juicy. There was a nice ratio of crumb to fruit. It looked beautiful going into the preheated oven for the suggested 20 minutes. There was very little change in the appearance after the 20 minutes. The final result is wonderful. It is a crumb-covered, moist, and tangy cake that is delicious.
Originally published July 13, 2019