Preheat your oven to 350°F (175°C). This ensures that your brownies bake evenly.
Line a 9x9 inch baking pan with parchment paper, leaving some overhang for easy removal later. This will also help prevent sticking.
In a large mixing bowl, whisk together the vegetable oil, granulated sugar, and vanilla extract until well combined. Add in the unsweetened applesauce and melted unsweetened chocolate, mixing until smooth.
In a separate bowl, sift together the unsweetened cocoa powder, flour, and salt. This helps to break up any lumps and ensures an even distribution of dry ingredients.
Gradually add the dry mixture to the wet mixture, using a spatula to fold them together. Be careful not to overmix; you want just combined.
Gently fold in the vegan chocolate chips, ensuring they are evenly distributed throughout the batter.
Pour the batter into the prepared baking pan, smoothing the top with your spatula. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
Allow the brownies to cool in the pan for about 10 minutes before using the parchment paper to lift them out. Let them cool completely on a wire rack before slicing into squares. Enjoy your decadent, fudgy vegan brownies!