Cupcakes 1 ½ cups whole wheat flour 1 cup brown sugar 1/3 cup cocoa powder, sifted 1 teaspoon baking soda ½ teaspoon salt 1 cup whole milk 1/3 cup canola oil 1 tablespoon vinegar 1 teaspoon vanilla extract Cream Cheese Chocolate Filling 4 ounces cream cheese, softened 3 tablespoons sugar 1 large egg yolk 1/8…