In a large freezer bag, place a piece of dry ice. Close the plastic bag, but leave a one-inch (2 ½ cm) opening to prevent the bag from fill with gas.
2. Step
Cover the bag with a kitchen towel and carefully use a kitchen mallet to break the dry ice into a powder.
3. Step
In a large bowl, combine heavy cream, half & half, sugar, activate charcoal (avoid consuming more than 100 grams of activated charcoal),2 tablespoons mint extract, and at least 4 tablespoons black food coloring (more food coloring might be needed depending on concentration).
4. Step
Whisk together ice cream mixture until frothy.
5. Step
Slowly add a spoonful of dry ice into the mixture and whisk together. Gradually add and mix in dry ice until a solid consistency is achieved.
6. Step
Wait for all the dry ice to evaporate before consuming. Do not eat solid dry ice.
7. Step
For best results, eat within 24 hours.
8. Step
*Consuming activated charcoal can interact with certain medications, check with your doctor before ingesting
