Add cacao powder to the milk and whisk until well combined.
Add sugar and corn starch to the cacao milk mixture and whisk well to avoid lumps.
Place the saucepan over low heat.
Stir the mixture constantly as it heats up. Continue cooking until the mixture thickens to a pudding-like consistency. This may take about 10 minutes.
Add salt to the cacao milk mixture and mix well.
Add the butter and stir until it's completely melted and incorporated.
Continue to cook over low heat for around 20 minutes, stirring continuously until the mixture thickens and pulls away from the sides of the pan.
Once the mixture has thickened, remove the saucepan from the heat. Pour the mixture into the prepared baking tray lined with parchment paper.
Smooth the top with a spatula. Allow the chocolate mixture to cool to room temperature and then refrigerate for a few hours or overnight until set.
Once set, remove the butter truffles from the baking tray, place it on a cutting board, and remove the parchment paper.
Cut it into rectangles and then into small squares.
Coat the truffles with cacao powder to prevent sticking and add extra flavor.
Place the truffles in a bowl or plate.
Serve and enjoy the truffles.
Notes
Consistent Size: Ensure that you roll the truffles into consistently sized balls to ensure even cooking and a uniform appearance.Precision in Measurements: Be precise with measurements, especially for ingredients like sugar and corn starch, to maintain the correct balance of sweetness and texture.Continuous Stirring: Stir the chocolate mixture continuously while it's cooking to prevent it from sticking to the bottom of the saucepan and to achieve a smooth consistency.Butter Incorporation: Add the butter and stir until it's completely melted and incorporated. This contributes to a creamy texture.Cooling Time: Allow the chocolate mixture to cool to room temperature before refrigerating. This ensures that the truffles will set properly and have the right consistency.Chilling Duration: Refrigerate the chocolate mixture for the recommended time (at least 6 hours) to allow it to firm up. This step is crucial for shaping the truffles.Coating: Coat the truffles with additional cocoa powder and make sure the coating is evenly applied for a polished appearance.Serving: Before serving, allow the truffles to come to room temperature for a few minutes. This enhances the flavor and ensures a creamy texture.Storage Conditions: Store the truffles in an airtight container in the refrigerator. Bring them to room temperature before serving for the best taste and texture.