Mint brownies

based on these, incorporating the comments

brownies:
1.5 sticks butter
4 oz unsweetened chocolate, chopped
3 eggs
1.5 c sugar
3/4 c flour
1/2 c chocolate cookie crumbs
1 t vanilla
1.5 t mint syrup
1/2 t salt
a little more butter and some cocoa powder

Preheat oven to 350F. Melt butter and chocolate together in a small saucepan until smooth, then let cool. Beat together sugar and eggs until fluffy. Mix in all the other ingredients (except the last bit for the pan). Butter a 9x13" pan and dust with cocoa powder (great idea Jill!). Pour the batter into the pan, bake for 20 min until toothpick comes out almost clean, and cool for 10-20 min.

mint frosting:
3 c powdered sugar
3/4 stick butter, softened
3 T milk
1.5 t mint syrup

Beat together until creamy, and spread over warm brownies. Put in the fridge for an hour to set.

chocolate ganache:
1/2 stick butter
8 oz dark chocolate (18 squares of TJ's pound plus)
2 T milk

Melt together until smooth, cool for 5 min, spread over brownies, and stick back in the fridge until ready to serve.