Apple Crumble Coffee Cake
A delicious apple crumb cake recipe. Finally, after all these years, I've come up with a solution for people who can't decide whether to make an apple crumble or a coffee cake. This features the best things about both of those recipes. It's like baking a crumb-topped coffee cake on top of another coffee cake!
Ingredients
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2 teaspoons unsalted butter
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2 cups all-purpose flour
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1 teaspoon baking powder
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¾ teaspoon baking soda
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½ teaspoon fine sea salt
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1 ½ cups finely chopped toasted walnuts
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⅓ cup packed light brown sugar
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⅓ cup white sugar
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3 tablespoons unsalted butter, melted
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1 teaspoon ground cinnamon
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¼ teaspoon salt
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1 cup white sugar
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½ cup unsalted butter, at room temperature
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2 large eggs, divided
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1 cup plain yogurt
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1 ½ teaspoons vanilla extract
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2 Honeycrisp apples
Description
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Gather all ingredients.
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Preheat the oven to 350 degrees F (175 degrees C) with an rack in the center position. Generously butter a 9x12-inch baking dish with 2 teaspoons butter.
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Whisk flour, baking powder, baking soda, and ½ teaspoon sea salt together in a bowl; set dry ingredients aside.
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Combine walnuts, ⅓ cup brown sugar, ⅓ cup white sugar, 3 tablespoons melted butter, cinnamon, and ¼ teaspoon salt in a bowl until walnuts and sugars are thoroughly coated with butter; set crumble mixture aside.
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Beat 1 cup white sugar and ½ cup butter together in a separate bowl with a spatula until well blended.
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Whisk in 1 egg until mixture is smooth, 2 to 3 minutes.
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Whisk in second egg until thoroughly incorporated. Add yogurt and vanilla; whisk together.
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Add flour mixture to yogurt mixture; whisk just until flour disappears. Do not overmix.
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Remove and discard cores from apples. Cut apples into ⅛- to ¼-inch slices. Stack a few slices; cut down the center, lengthwise, then dice, crosswise, into cubes.
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Fold apples into cake batter with a spatula until just combined.
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Spread ½ the batter into the prepared baking dish; evenly scatter ½ crumble mixture over top.
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Dollop remaining ½ batter on top crumble mixture; spread carefully to evenly distribute, trying not to disturb the crumbs.
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Top with remaining ½ crumble mixture; press crumbs into the batter very gently.
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Bake in the center of the preheated oven until a toothpick or bamboo skewer inserted into the center comes out clean, about 40 minutes.
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Cool to room temperature before slicing and serving, about 30 minutes.