Preheat your oven to 350°F (175°C).
Grease and line four 8-inch round cake pans with parchment paper.
In a large bowl, whisk together the flour, granulated sugar, light brown sugar, cocoa powder, baking powder, baking soda, and salt.
Add the applesauce, plant-based milk, melted coconut oil, and vanilla extract. Mix until combined.
Gradually add the hot water, mixing until the batter is smooth.
Divide the batter evenly among the prepared pans.
Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cakes to cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.