Prep the Potatoes: Wash and peel your sweet potatoes. Chop them into small cubes and boil for about 15 minutes. Pro Tip: They should be "falling-apart" soft to ensure your cake doesn't have a stringy texture.
Melt the Dark Chocolate: Melt the dark chocolate in 30 second bursts in the microwave, stirring every 30 seconds until fully melted.
Blend to Perfection: Start by adding ½ cup of plant based milk to your blender with the potatoes and melted chocolate. If your blender struggles or the sweet potatoes are extra starchy, slowly add in up to an additional ½ cup (totalling 1 cup) until the mixture starts to blend. Blend until completely smooth.
Taste Test Time: Before pouring the batter into your pan, grab a spoon and give it a quick taste. Sweet potatoes naturally vary in sweetness, so if your sweet tooth is craving a bit more sweetness, this is the perfect moment to add in 1 to 2 tablespoons of pure maple syrup and blend until combined.
Pour into Springform Pan: Line a springform pan with parchment paper. Pour the mixture in and smooth the top.
Add the Icing and Set The Fudge: Whisk together the melted icing chocolate and milk, then pour it over the cake. Refrigerate overnight. This is what gives this cake its signature fudge-like consistency.