Apple Cinnamon Snack Cake in 50 Minutes

Instructions:

1. Preheat your oven to 350°F (175°C) and grease your 9x9 pan, lining the bottom with parchment paper for an easy release.
2. Peel and dice the apples into 1/4 inch cubes. Toss them in a small bowl with 2 tbsp brown sugar and 1 tsp cinnamon until the fruit is mahogany-colored and coated.
3. In a large bowl, whisk together the flour, granulated sugar, baking powder, baking soda, cinnamon, and salt.
4. Create a well in the center of the dry ingredients and add the oil, eggs, vanilla, and sour cream.
5. Stir with a spatula until just combined. Stop the moment no dry flour streaks remain to avoid over-mixing the gluten.
6. Pour half of the batter into the prepared pan.
7. Spread half of the cinnamon-apple mixture evenly over the batter.
8. Top with the remaining batter and the rest of the cinnamon-apple mixture, then brush the top with melted butter.
9. Bake for 35 minutes or until a toothpick inserted into the center comes out clean.