Apple Streusel Coffee Cake
from https://dancearoundthekitchen.com/

Moist and flavorful Apple Streusel Coffee Cake has a layer of cinnamon apples in the center and is topped with lots of buttery streusel topping! This coffee cake is great for breakfast, brunch or even as a dessert!

She tells you, and the picture confirms this: "It's a pretty thick layer of streusel, so I find that it works well to press some of the topping into the batter a bit." So I would decrease the amount of topping.

Streusel Topping
2/3 cup flour
1/2 cup brown sugar
1 teaspoon cinnamon
4 tablespoons butter softened

Apple Filling
1/2 cup brown sugar
1 1/2 tablespoons flour
1 1/2 teaspoon cinnamon
1 1/2 cups diced apples

Coffee Cake Batter
1 3/4 cup flour
1 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
6 tablespoons butter
1/3 cup sugar
1/4 cup brown sugar
1 egg
1 teaspoon vanilla
3/4 cup buttermilk

Preheat oven to 350°F and grease or line an 8x8-inch or 9x9-inch square baking pan with parchment paper; set aside.

Make the Streusel Topping
In a small bowl, combine the brown sugar, cinnamon and flour.

Add the softened butter and use a fork to cut the butter into the dry ingredients until the mixture begins clumping together; set aside.

Make the Apple Filling
Combine the brown sugar, flour and cinnamon in a bowl.
Add the peeled and diced apples and stir until well-combined; set aside.

Make the Batter
Add the flour, baking powder, baking soda and salt to a bowl; stir and set aside.

Add the butter and sugars to a large mixing bowl or a the bowl of a stand mixer.

Cream the butter and sugars for a couple minutes, or until light and fluffy.

Add the egg and vanilla; stir well, scraping down the sides at least once.

Add about half of the dry ingredients and mix to combine.

Continue mixing while adding the buttermilk slowly; scrape the sides of the bowl.

Add the remaining dry ingredients, stirring until just combined.

Assemble and Bake
Pour a little more than half of the batter into the prepared pan; spread to an even layer.

Sprinkle the apples over the batter.

Spoon the remaining batter over the apples and smooth it out to an even layer.

Top with the streusel topping, pressing it into the batter gently.

Bake for about 30 minutes, or until a toothpick inserted in the center comes out with just a few moist crumbs (not runny batter).

Let cool, then cut and enjoy!