Preaheat your oven to 350F . Grease a brownie pan. Set a side.
In a sauce pan melt butter and chocolate. Let it cool and set a side. Place eggs and sugar in a large bowl and whisk together, add the vanilla. Stir in the flour until mixed together, then add the melted chocolate into the mixture until combine. Finally add the chopped walnuts and the cherries. Pour the batter into the grease brownie pan.
Bake in the preheated oven for 30 minutes. Let it stand for 10 minutes cut them into 12 squares.