Blackberry and Mint Chocolate Muffins

Preheat oven to 400°F.

Whisk together all of the dry ingredients (cocoa powder through salt) in a medium-sized mixing bowl. In a separate, smaller bowl, combine eggs, milk, vanilla and vinegar. Add wet ingredients into dry, adding the melted butter as well. Whisk just to combine, not worrying about any small lumps that may exist in the batter. Fold in blackberries and chopped mint.

Spoon the batter into two 12-count baking cup lined muffin tins and bake in at 400°F for 20 minutes.

(Recipe adapted from Dorie Greenspan.)