Cinnamon Apple Cake

Instructions

1. 1
   Preheat oven to 350°F (175°C). Grease a 9-inch cake pan or line with parchment paper.
2. 2
   In a medium bowl, whisk together flour, baking powder, baking soda, salt, and cinnamon.
3. 3
   In a large bowl, beat butter and brown sugar with an electric mixer until light and fluffy.
4. 4
   Add eggs, one at a time, mixing well after each. Stir in vanilla extract.
5. 5
   Mix in yogurt (or sour cream) until smooth.
6. 6
   Add the dry ingredients to the wet ingredients and mix until just combined.
7. 7
   Gently fold in the diced apples with a spatula.
8. 8
   In a small bowl, combine granulated sugar and cinnamon for the topping.
9. 9
   Spread half the batter into the prepared pan. Sprinkle with half the cinnamon-sugar mixture. Add the remaining batter and sprinkle the rest of the cinnamon-sugar on top. Swirl gently, if desired.
10. 10
    Bake for 38–42 minutes, or until a toothpick inserted in the center comes out mostly clean.
11. 11
    Cool in the pan for 10–15 minutes, then transfer to a wire rack. Slice and serve warm or at room temperature.