Preheat the oven to 350℉/176℃ and line a 9x9 baking pan with parchment paper and set aside.
In a bowl, add the dry ingredients. Mix together and set aside.
1 3/4 cups all-purpose flour, 3/4 tsps baking soda, 3/4 tsps baking powder, 1/4 tsp cinnamon, 1/4 tsp salt, 1 1/2 tsp cornstarch
In a large bowl, add the wet ingredients. Whisk for 2-3 minutes until combined.
3/4 cups white sugar, 2 large eggs, 2/3 cups oil, 1 tbsp vanilla, 1/3 cup sour cream
Combine the wet and dry ingredients until a cake batter forms. Mix just until the dry streaks disappear, do not over-mix!
Spread evenly into the prepared pan. Sprinkle raspberries on top.
2 cups fresh raspberries
Bake for 40-50 minutes. Mine took 45 minutes. The cake is ready when a toothpick inserted comes out clean.
Once baked and cooled, dust powered sugar on top (optional).