<human>:  How can I make the best vegan brownies?
<bot>: To make the best vegan brownies, start by preheating your oven to 350°F. Then, in a large bowl, mix together 1¾ cups all-purpose flour, 1 teaspoon baking powder and ½ teaspoon salt. Next, melt 1 cup of vegan butter in a medium-sized saucepan. Once the butter has melted, stir in 1 cup of vegan semi-sweet chocolate chips and 2 teaspoons of vanilla extract. Remove the saucepan from the heat and add 1½ cup of dark brown sugar. Stir until the sugar has dissolved. Next, slowly add the dry ingredients to the wet mixture and stir until everything is evenly combined. Finally, pour the brownie batter into a greased 9x13-inch baking pan and bake in the preheated oven for 25–30 minutes. Enjoy!