Grease your crock pot.
In a large bowl whisk together 1 1/4 cup Swerve, flour, 3 tablespoons cocoa powder, salt and baking powder.
In a another small bowl stir the cooled melted butter with eggs, yolks, vanilla extract and liquid stevia.
Add the wet ingredients into the dry ingredients until combined.
Pour this into the crock pot.
Top with chocolate chips.
Whisk the remaining 2 tablespoons cocoa powder and remaining Swerve sweetener with hot water.
Pour over the top of the chocolate chips.
Cover and cook on low 3 hours.
Allow to cool slightly before serving.