Preheat oven to 350ºF. Grease and flour a bundt pan or a 9 inch by 9 inch metal baking pan. Set aside.
In a medium bowl, whisk together flour, cinnamon, baking powder, baking soda, and salt. Set aside.
2 cups all-purpose flour, 3 teaspoons ground cinnamon, 1 teaspoon baking powder, ½ teaspoon baking soda, 1 teaspoon kosher salt
In bowl of a stand mixer, beat butter and both sugars on low speed until blended.
½ cup unsalted butter, 1 cup dark brown sugar, ¼ cup granulated sugar
Increase speed of mixer to medium-high and beat 3 minutes until well combined. Mixture should be light in color, smooth, and fluffy. Stop the mixer to scrape the bottom and sides of the bowl as needed to ensure all the butter is evenly incorporated.
Add eggs one at a time, beating well after each addition. Stop the mixer to scrape the bottom and sides of the bowl as needed.
2 large eggs
Reduce mixer speed to low and beat in the applesauce (don’t worry if the mixture looks curdled, it’s supposed to look that way!).
1 ¼ cups applesauce
Stir in the flour mixture on low speed until smooth, scraping bowl occasionally with rubber spatula to ensure it’s fully mixed. Do not overmix or the cake will become dense.
Scrape batter into the prepared bundt pan and spread evenly. Bake for 40 minutes or until toothpick inserted in center of cake comes out with just a few crumbs attached to it (bake time is the same for both the bundt pan and the 9×9 pan).
Cool slightly on a wire rack. Just before serving, dust with powdered sugar or drizzle with caramel sauce. Slice and serve!
powdered sugar or caramel sauce