Preheat your oven to 350°F (175°C).
Grease and line a 9x13-inch baking dish or cake pan.
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
In another bowl, mix the applesauce, plant-based milk, melted coconut oil, vanilla extract, and lemon juice.
Combine the wet and dry ingredients, stirring until just mixed.
Pour the batter into the prepared pan and spread evenly.