Preheat the oven to 350°F (175°C).
In a small bowl, whisk the cocoa powder with hot water until smooth and glossy. Set aside.
In a large mixing bowl, combine ricotta, Greek yogurt, eggs, vanilla extract, and brown Swerve. Mix until smooth and well incorporated.
Add the bloomed cocoa and baking powder. Mix again until evenly combined.
Pour the batter into an 8-inch round silicone baking mold and smooth the top.
Bake for at least 60 minutes, until the edges are set and the center is slightly jiggly. But
Remove from the oven and allow to cool completely, then refrigerate for at least 2 hours before slicing.