Preheat oven to 180 C / 350°F.: As you heat the oven, notice the quiet hum as it stabilizes and the warm scent that begins to fill your kitchen. Accurate temperature ensures even rise and a golden crust, so place a rack in the center before turning the oven on. A common mistake is relying on dial numbers without a thermometer, which can lead to overbrowned edges or an underbaked center. If your oven runs hot, lower the temperature slightly and check earlier than the recipe time.
Put the apples into a small pot with 1/2 cup of water, 1 tsp cinnamon, and 1 Tbsp of brown sugar. Bring to a boil and then cook for 4 minutes. Drain and allow to cool slightly.: You'll hear a gentle simmer that signals the apples are softening, and the spices will perfume the kitchen with warm notes. This brief cooking tenderizes the apple pieces so they integrate into the cake without releasing excess juice while baking. Drain well to avoid a soggy batter, and let them cool so they do not melt the creamed mixture on contact. A typical slip is underdraining, which can make the cake center too moist, so feel the pieces before arranging them.
Sift the flour & baking powder in a bowl.: The soft sigh of flour through the sieve is satisfying, and sifting aerates the mixture so the batter stays light. Even distribution of baking powder prevents pockets of uneven rise. If you skip sifting, you may get lumps or uneven texture; whisking well can be a fallback, but sifting is the best practice for a delicate crumb.
Using an electric mixer, cream the butter and the 3/4 cup of sugar together until light and fluffy. Add the eggs, one at a time making sure each is well incorporated before adding the next. Add the dry ingredients and mix briefly until just combined.: You will see the mixture turn pale and airy as the butter and granulated sugar trap air, which is essential for lift. Adding eggs one by one ensures the emulsion stays stable, creating a smooth, glossy batter. When folding in the sifted flour and baking powder , stop as soon as streaks disappear to avoid developing too much gluten. A frequent problem is overmixing, leading to a dense cake, so be gentle and patient here.
Spoon the cake batter into a 23 cm / 9-inch springform cake tin that has been lined with baking paper and smooth the top. Arrange the cooked apple chunks and then cherries evenly over the batter. Sprinkle the top with a little brown or white sugar and a light dusting of cinnamon.: As you smooth the batter, you’ll feel its weight and see a glossy surface ready to accept fruit. Evenly spaced apple pieces and cherries ensure balanced flavor and even baking, and the sugar on top will melt and caramelize into a delicate crust. If fruit is piled too high, the center may remain underbaked, so press fruit lightly into the batter for stability. Keep edges clear so heat can circulate.
Bake until the cake is golden brown and a sharp knife inserted into the center part of the cake comes out clean, about 45 to 50 minutes. If your cake is over-browning, loosely cover it with foil from about 3/4 of the way through the baking time. Cool on rack.: The oven will transform the batter into a fragrant, golden cake, and you’ll notice the top setting and edges pulling away from the pan slightly. A clean knife indicates doneness, and a light jiggle in the center is normal. If the top browns too quickly, tent with foil to protect the surface while the center finishes. Cutting into an underbaked cake is a common mistake, so test several points near the center.
Once cool, leave it at room temperature overnight before taking it out of the tin. You could serve this with whipped cream, vanilla ice cream, or with a light sifting of icing sugar.: Allowing the cake to rest changes the texture, letting flavors meld and the crumb become more cohesive. The aroma mellows and the fruit integrates into the sliceable cake you want for serving. If you try to unmold while still warm, it may break apart, so patience rewards you here. Popular serving options include a scoop of ice cream, though the cake is lovely on its own; avoid storing uncovered which dries the crumb.