Rich, silky, and deeply flavored, this dark chocolate ice cream balances Dutch-process cocoa and melted dark chocolate with the subtle tang of buttermilk for a clean, sophisticated finish. Smooth, scoopable, and layered with complex cocoa notes, it evokes the character of fine European chocolate.
Ingredients
Chocolate Custard Base:
- 1½ cups heavy cream
- 1 cup whole milk
- ¾ cup sugar, divided
- ½ cup Dutch-process cocoa powder
- 4 oz dark chocolate (60–70%), finely chopped
- 4 egg yolks
- ½ tsp instant espresso powder (optional, for depth)
- ½ tsp vanilla extract
- pinch table salt
- ⅛ tsp xanthan gum (stabilizer)
After Cooking:
- ¾ cup cold buttermilk
- 1 tbsp light corn syrup (optional, for slightly softer texture)
Directions
Bloom the Cocoa
In a medium saucepan, whisk cocoa powder with ½ cup of the milk and ¼ cup sugar to form a smooth paste. Add remaining milk, heavy cream, espresso powder (if using), and salt. Heat over medium until steaming and sugar is dissolved.
Melt the Chocolate
Remove from heat and whisk in the chopped dark chocolate until melted and glossy. Return briefly to low heat only if needed to melt fully.
Make the Custard
In a separate bowl, whisk egg yolks with remaining ½ cup sugar until pale and thick. Temper slowly with ½ cup warm chocolate mixture, then return mixture to the saucepan.
Cook gently over low heat, stirring constantly, until custard coats the back of a spoon (170–175°F / 77–80°C). Do not boil. Remove from heat and stir in vanilla and optional corn syrup.
Add the Xanthan Gum
While custard is warm (below 160°F / 70°C), sprinkle xanthan gum evenly over the surface and immediately blend with an immersion blender or whisk vigorously until fully dispersed. Strain through a fine mesh sieve.
Incorporate the Buttermilk
Cool mixture to lukewarm (below 110°F / 43°C). Whisk in buttermilk to preserve fresh tang and prevent curdling. Chill thoroughly, preferably overnight.
Churn & Freeze
Churn in an ice cream maker according to manufacturer’s instructions. Transfer to a container and freeze until firm, about 4 hours.
Notes
Preparation
- Xanthan gum gives smoother body and reduces iciness—use sparingly.
- If using corn syrup, reduce total sugar to ⅔ cup to maintain balance.
- Espresso powder intensifies chocolate flavor without adding coffee notes.
- For extra richness, replace ½ cup of the whole milk with half-and-half.
- Using Natural Cocoa Powder: Add ⅛ tsp baking soda during the “Bloom the Cocoa” step to reduce acidity and deepen color. Increase chocolate to 4½ oz and reduce buttermilk to ⅔ cup.
Serving Suggestions
- Top with dark chocolate curls or shavings.
- Pair with espresso caramel, berries, or almond biscotti.
- Finish with a pinch of flaky sea salt for contrast.
Make-Ahead & Storage
- Refrigerate the custard base up to 2 days before churning.
- Store churned ice cream in an airtight container up to 1 week.
- Soften 5–10 minutes at room temperature before serving.
