Step 1: Prepare Your Pan - Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with parchment paper for easy removal.
Step 2: Melt Chocolate and Butter - In a double boiler or microwave-safe bowl, melt the finely chopped unsweetened chocolate and butter together, stirring until smooth. Set aside to cool slightly.
Step 3: Mix Dry Ingredients - In a separate bowl, whisk together the allulose, salt, cocoa powder, and espresso powder if using.
Step 4: Combine Wet Ingredients - In another bowl, whisk the eggs and vanilla extract together until frothy. Add the melted chocolate mixture and coconut milk, mixing until well combined.
Step 5: Combine Dry and Wet Ingredients - Gradually fold the dry ingredients into the wet mixture until just combined.
Step 6: Add Chocolate Chips - Fold in the chocolate chips, ensuring they are evenly distributed throughout the batter.
Step 7: Bake the Cake - Pour the batter into the prepared cake pan and smooth the top. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Step 8: Cool and Serve - Allow the cake to cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.
