Preheat the oven to 338°F (170°C) and grease and line the bottoms of two 8-inch cake pans with parchment paper.
In a small bowl, combine the cake flour, cocoa powder, salt, baking soda, and baking powder. Set aside.
In a large bowl, combine the granulated sugar, light brown sugar, canola oil, sour cream, milk, coffee, and vanilla extract. Add the dry ingredients and stir until just combined.
Pour evenly into the two pans and bake for about 30 to 35 minutes.
Let them cool in the pan for about 10 minutes before taking it out or the cake pan onto a wire rack to cool completely.