In a small sauce pan, heat chocolate chips, butter and unsweetened cocoa powder over low heat until melted. Let cool.
In a large mixing bowl, beat eggs and sugar until nice and fluffy, about 3 minutes. Add vanilla and beat until combined.
Pour cooled chocolate mixture into sugar mixture. Stir until combined.
Add flour and salt. Gently stir until combined.
Pour into prepared mini muffin pans.
Bake for approximately 10-14 minutes.
Remove from oven and let cool completely before adding frosting.