Preheat oven to 350°F (175°C).
In a mixing bowl, cream together butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.
In a separate bowl, sift together flour, baking powder, and cocoa powder.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Spoon the batter into mini muffin tins or tart pans, filling each about 2/3 full.
Bake for 12-15 minutes or until a toothpick inserted comes out clean.
Allow to cool completely before decorating with whipped cream and fresh fruits.
For variety, melt chocolate chips and drizzle over some of the mini desserts.
Arrange on a serving platter and garnish with mint leaves if desired.