Get Ready: Preheat your oven to 375°F (190°C). Grab an 8-inch round cake pan, lightly spray it with cooking spray, and line the bottom with parchment paper. This makes for easy removal!
Melt It Down: In a medium microwave-safe bowl, combine 1 cup of sugar-free chocolate chips and the unsalted butter. Microwave on high for about 1 minute. Give it a good stir until the chocolate is completely melted and smooth. If it needs a little more coaxing, microwave for another 10 seconds.
Mix the Batter: Into your melted chocolate mixture, stir in the sugar-free sweetener, salt, and vanilla extract. Next, gently whisk in the beaten eggs until well combined. Finally, fold in the Dutch process cocoa powder until you have a thick, rich batter.
Bake the Cake: Pour the delicious batter into your prepared cake pan and spread it out evenly. Bake in the preheated oven for 20-25 minutes. You'll know it's done when a toothpick inserted into the center comes out with just a few moist crumbs. Let the cake cool in the pan for 10 minutes.
Whip up the Ganache: While the cake cools, warm the heavy cream in a small microwave-safe bowl for about 1 minute until steaming. Immediately add the remaining ½ cup of sugar-free chocolate chips and stir until they've completely melted into a smooth, glossy ganache.
Finish & Serve: Carefully invert the cooled cake onto a serving plate and peel off the parchment paper. Generously spread the warm ganache over the top. For the ultimate indulgence, serve warm, or if you prefer a firmer ganache, pop it in the refrigerator for about 20 minutes to set. Enjoy your healthy, decadent treat!