Mamta
Preheat the oven to 350 degrees F (175 degrees C).
Grease a 9x13-inch baking dish with baking spray; line bottom with parchment paper.
Whisk flour, sugar, cocoa powder, baking powder, and salt together in a large bowl until combined.
Pour in water (or coffee), vegetable oil, and vanilla; mix until well-blended. Spread batter evenly in the prepared dish.
Bake in the preheated oven until top is no longer shiny and center feels just set when gently pressed, about 30 minutes.
Let cool for at least 10 minutes before cutting into 15 squares.
Serve these rich and fudgy vegan brownies for a guilt-free indulgence that's sure to satisfy your sweet tooth.