Bring sweeteners, chocolate, oil and cream slowly to a boil, stirring often. Boil one full minute, stirring occasionally. Remove from heat. Add tofu and vanilla, beat with immersion blender, or pour into blender and pulse until creamy. Add nuts, stir.
Pour mixture into glass bowl lined with parchment paper. Cool until firm, then cut into cubes. Return to refrigerator until hardened. Store in refrigerator. 135.1 Calories per serving