Preheat the oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper.
In a microwave-safe bowl, melt the semisweet chocolate chips in 30-second intervals, stirring after each, until smooth. Let cool slightly.
In a food processor, combine the mashed avocado, eggs, granulated sugar, and vanilla extract. Blend until smooth and creamy.
Add the melted chocolate to the avocado mixture and blend until well combined.
In a separate bowl, whisk together the unsweetened cocoa powder, almond flour, baking powder, and salt.
Add the dry ingredients to the wet mixture and pulse until just combined, ensuring not to overmix.
Pour the batter into the prepared baking pan, spreading it evenly.
Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
Allow the brownies to cool completely in the pan before lifting them out using the parchment paper. Cut into squares and serve.