1. Preheat oven to 350°F
2. Grease mini muffin tins very well.
3. Melt chocolate and butter together in a sauce pan over very low heat.
4. Whisk together flour, cocoa, and salt in a medium bowl.
5. Remove chocolate pan from heat when all is melted. Add 3 1/2 cups of sugar, stirring until incorporated.
6. Add eggs, one at a time, whisking into chocolate.
7. Stir in flour mixture until just blended.
8. Pour mixture into muffin tins and bake on middle rack for 13 minutes.
9. Remove from oven and cool. Dust with powdered sugar.

Note: If the batter is too thick to pour, but it into a bag and pipe it into the cups!