Our coffee cake is outrageously good with vanilla butter cake batter swirled with brown sugar cinnamon streusel. We also add a maple butter drizzle after baking. It’s very good, but you can leave the cake plain or simply add a dusting of powdered sugar on top instead.
12 tablespoons (170 grams or 1 1/2 sticks) unsalted butter, at room temperature
2 large eggs, at room temperature, see notes
1 large egg yolk, at room temperature, see notes
2 1/4 cups (282 grams) all-purpose flour, see notes
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon fine sea salt
3/4 cup (150 grams) brown sugar
1/2 cup (100 grams) granulated sugar
1 tablespoon pure vanilla extract
3/4 teaspoon almond extract
1 1/4 cups (10 ounces) sour cream
1/2 cup (113 grams or 1 stick) unsalted butter, melted
1 tablespoon molasses
1 tablespoon ground cinnamon
1/4 teaspoon fine sea salt
1/4 teaspoon grated nutmeg
1/3 cup (66 grams) brown sugar
1/4 cup (50 grams) granulated sugar
1 1/3 cups (167 grams) all-purpose flour
2/3 cup (70 grams) walnuts, chopped, optional
2 tablespoons unsalted butter
1 tablespoon pure maple syrup
1/2 cup (60 grams) powdered sugar
1 tablespoon milk
Pinch fine sea salt
Center a rack in the oven and heat to 350 degrees Fahrenheit. Line a 9-inch by 13-inch baking pan with parchment paper and lightly spray with nonstick cooking spray.
In a medium bowl, sift or whisk the flour, baking powder, baking soda and salt together.
In a large bowl, beat 12 tablespoons of room temperature butter, brown sugar and the granulated sugar with an electric mixer on high speed until light and fluffy, 2 to 3 minutes. (Alternatively, add butter and sugars to the bowl of a stand mixer and mix on medium speed until fluffy.)
Beat in the eggs, one at a time, then add the egg yolk, vanilla and almond extract.
With the mixer on low speed, add one-third of the flour mixture to the batter. When it’s mostly combined, add another third and mix until almost no flour remains. Add the sour cream and mix just until smooth then finish by adding the remaining flour to the batter and beat until just combined. Finish stirring with a spatula to be sure the batter is completely blended.
In a medium bowl, whisk the melted butter with the molasses, cinnamon, nutmeg and salt until well blended. Add the brown sugar, granulated sugar, and flour. Stir until a soft dough forms. Stir in nuts (optional).
Spread about half of the cake batter into the prepared baking pan. It’s okay if the batter doesn’t spread all the way to each corner. Scatter half of the streusel over the cake batter. (I like to scatter some larger pieces as well as come crumbles for interest.)
Spoon dollops of the remaining batter on top of the streusel, and then spread into an even layer. It’s okay if some of the streusel from below gets mixed in to the top layer of batter. Finish with the remaining streusel on top. It might look like too much, but don’t worry, the batter rises quite a bit, while some of the streusel will fall down into the cake.
Bake the coffee cake until it’s starting to pull away from the sides of the pan, is springy and a cake tester or toothpick can be inserted and comes out mostly clean, 40 to 50 minutes.
Cool in the baking pan for 10 minutes, and then transfer the cake to a wire rack and cool completely.
Melt the butter in a small bowl, and then stir in the maple syrup. Whisk in the powdered sugar, milk and salt. The mixture should be the consistency of thick syrup and easy drizzled. If it’s too thin, add a little more powdered sugar. If it is too thick, add a little more milk.
Drizzle the maple butter frosting over the cake, and then set aside for 5 minutes or until it hardens slightly. Cut the cake into 12 large slices or 24 smaller slices, and then serve.
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