Preheat oven to 350 degrees F (175 degrees C). Grease a silicon muffin pan.
In a large microwave bowl , melt 1/2 cup butter.
Stir in sugar, eggs, and 1 teaspoon vanilla. Beat in 1/3 cup cocoa, 1/2 cup flour, salt, and baking powder. Pour batter into prepared muffin pan. (each 1/2 full)
Bake in preheated oven for 15. Do not overcook.
after they cool slightly - invert the pan and pop out individual brownies
To Make Frosting: Combine 3 tablespoons softened butter, 3 tablespoons cocoa, honey, 1 teaspoon vanilla extract, and 1 cup confectioners' sugar. Stir until smooth. Frost brownies while they are still warm.