Whisk together 2/3 a cup of cocoa, 2 cups plain flour, 1 ¼ packed cup brown sugar, a teaspoon each of baking powder and soda, and dash or so of salt. Set aside. Beat 2 large eggs into ¾ cup milk. Add 2 teaspoons vanilla extract and a slash of vinegar along with a melted stick of butter. Mix dry and wet ingredients. Blend just enough to ensure the moisture is evenly mixed; muffins don’t need a lot of work. Bake at 350 for about a half hour.