Preheat the oven to 350 degrees F and line an 8” x 8” baking pan with parchment paper.
Add everything to a blender or food processor and blend until completely creamy. Batter will resemble pudding. (If adding chocolate chips or nuts, wait to add after blending. Stir in any solid add ins, like chocolate chips, nuts, seeds, or shredded coconut.)
Transfer batter to the parchment-lined baking dish and smooth into an even layer. Bake 30 to 40 minutes, or until brownies have risen, puffed up, and are pulling away from the edges slightly.
Allow brownies to cool at least 30 minutes before slicing and serving.