½cupunsalted butter, softened to room temperature (1 stick)
¾cupgranulated sugar
1large egg
1tsp vanilla extract
½cupmilk
Filling
1cupapplesauce (homemade or store bought)
Streusel Topping
¾cupall purpose flour
⅓cupgranulated sugar
5tablespoonunsalted butter, softened to room temperature
½teaspoonvanilla extract
¼teaspoonground cinnamon
¼teaspoonground nutmeg
Instructions
Preheat the oven to 350°F. Grease a 9-inch round baking pan.
Prepare the streusel by combining the flour, sugar, softened butter, vanilla and cinnamon, and nutmeg in a mixing bowl. Use a wooden spoon, rubber spatula, or your fingers to crumble the mixture into small lumps. Set aside.
In a medium mixing bowl, whisk together the flour, baking powder, cinnamon, and salt. Set aside.
In the bowl of a stand mixer with the paddle attachment or in a large mixing bowl with an electric hand whisk, beat the softened butter and sugar until it is pale and fluffy, after 3 to 5 minutes.
Add the egg and vanilla and beat the mixture again on a medium to high speed.
Add the milk and mix for 30 seconds.
Add the flour mixture to the butter mixture. Mix on a low speed until you no longer see dry pockets of flour. Scrape the sides and bottom of the bowl with a rubber spatula or spoon to ensure everything is well mixed.
Spread two-thirds of the cake batter into the prepared baking pan in an even layer. Spread the applesauce on top, and use the back of a spoon to spread it in an even layer. Spread the remaining cake batter on top of the applesauce in an even layer. Sprinkle the streusel topping on top.
Bake for about 40 to 50 minutes, until a toothpick or knife inserted into the center of the cake comes out clean.
Allow to cool on a cooling rack to room temperature. Enjoy!!
Notes
I recommend using a springform pan or a cake tin with a removable bottom. This makes it much easier to get the whole cake out of the tin at one time.
The cake batter is very thick. When adding the top cake batter layer, first put dollops of cake batter distributed on top of the applesauce. Then use a rubber spatula or butter knife to gently spread the cake batter dollops into an even layer that covers all the applesauce.
If your applesauce is runny, use paper towels to blot away some of the excess moisture.