Preheat the oven to 350.
Using a spoon, stir eggs with sugar and vanilla, in a medium size bowl
Add melted butter. Be careful that it's not too hot or you'll scramble your eggs.
In a small bowl, whisk together ground chocolate with flour, baking powder and salt.
Stir the dry ingredients into the egg mixture.
Spray or grease 36 mini muffin cups.
Spoon batter evenly into the muffin cups (about 1 heaping teaspoon).
Bake for 13-15 minutes or until top is set and a toothpick inserted into the center comes out slightly wet.
After the brownies are out of the oven, wait for the centers to fall. This happens with cooling, but if not, make an indentation in the center of each one.
See Peanut Butter Cup Brownies instructions to complete.