Add vegan dark chocolate chips, ¼ cup plant-based milk, and 1 tablespoon coconut oil into a microwave-safe bowl.
Set the microwave to 50-70% power to prevent burning. Heat for 30 seconds, then remove and stir well.
Continue microwaving in 15-second intervals, stirring after each until the chocolate is fully melted and smooth.
Transfer the ganache to the refrigerator to chill for 30–40 minutes, or until firm enough to scoop.
Prepare the Cake Batter:
Preheat the oven to 375°F (190°C) and grease 4 small 6-ounce (180 ml) ramekins with coconut oil or cooking spray. Lightly dust them with cocoa powder to prevent sticking.
In a small bowl, mix plant milk and apple cider vinegar. Let it sit for 5 minutes to curdle.
In a large bowl, sift together the flour, cocoa powder, baking powder, baking soda, and salt.
Add the sugar, melted coconut oil, and prepared milk mixture. Whisk until smooth; a few small lumps are okay, as it’s better to not overmix the batter.
Fill the Ramekins and Bake:
Add 2–3 tablespoons of batter into each ramekin, spreading it evenly.
Scoop 1 tablespoon of the chilled ganache and gently place it in the center of each ramekin.
Cover the ganache with another 2–3 tablespoons of batter, ensuring the ganache is completely sealed inside.
Place the ramekins on a baking tray and bake for 14–16 minutes, until the edges are set but the centers are slightly soft.
Let the cakes rest for 1–2 minutes, then carefully run a knife around the edges and invert them onto serving plates.
Dust with powdered sugar and serve immediately with vegan vanilla ice cream if desired.
Notes
Refrigerator: Store any leftover lava cakes in an airtight container in the refrigerator for up to 3 days.
Freezer: Freeze these cakes in an airtight container or zip-top bag for up to 2 months. Thaw in the refrigerator before reheating or reheat from frozen.
To reheat: Warm the lava cakes in the microwave until the centers are melted.